diff --git a/SQIntervalTimer/SQIntervalTimer/Base.lproj/LaunchScreen.storyboard b/SQIntervalTimer/SQIntervalTimer/Base.lproj/LaunchScreen.storyboard
index 87ed24f1..8d12aa69 100644
--- a/SQIntervalTimer/SQIntervalTimer/Base.lproj/LaunchScreen.storyboard
+++ b/SQIntervalTimer/SQIntervalTimer/Base.lproj/LaunchScreen.storyboard
@@ -14,7 +14,7 @@
                     <view key="view" contentMode="scaleToFill" id="Ze5-6b-2t3">
                         <rect key="frame" x="0.0" y="0.0" width="414" height="896"/>
                         <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
-                        <color key="backgroundColor" red="0.10980392156862745" green="0.10980392156862745" blue="0.10980392156862745" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
+                        <color key="backgroundColor" white="0.0" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
                         <viewLayoutGuide key="safeArea" id="6Tk-OE-BBY"/>
                     </view>
                 </viewController>
diff --git a/SQIntervalTimer/SQIntervalTimer/Base.lproj/Main.storyboard b/SQIntervalTimer/SQIntervalTimer/Base.lproj/Main.storyboard
index fefd74d1..5e4c688e 100644
--- a/SQIntervalTimer/SQIntervalTimer/Base.lproj/Main.storyboard
+++ b/SQIntervalTimer/SQIntervalTimer/Base.lproj/Main.storyboard
@@ -25,27 +25,28 @@
                                     <outlet property="delegate" destination="BYZ-38-t0r" id="IP9-Xy-nc1"/>
                                 </connections>
                             </pickerView>
-                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="秒" textAlignment="natural" lineBreakMode="tailTruncation" numberOfLines="2" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="hPF-DO-Rzk">
-                                <rect key="frame" x="127" y="240" width="22.5" height="26.5"/>
+                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="" textAlignment="natural" lineBreakMode="tailTruncation" numberOfLines="2" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="hPF-DO-Rzk">
+                                <rect key="frame" x="149.5" y="253" width="0.0" height="0.0"/>
                                 <fontDescription key="fontDescription" type="boldSystem" pointSize="22"/>
                                 <color key="textColor" red="0.76684117892066839" green="0.76684117892066839" blue="0.76684117892066839" alpha="1" colorSpace="custom" customColorSpace="displayP3"/>
                                 <nil key="highlightedColor"/>
                             </label>
-                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="秒" textAlignment="natural" lineBreakMode="tailTruncation" numberOfLines="2" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="13o-bN-7YL">
-                                <rect key="frame" x="235.5" y="240" width="22.5" height="26.5"/>
+                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="" textAlignment="natural" lineBreakMode="tailTruncation" numberOfLines="2" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="13o-bN-7YL">
+                                <rect key="frame" x="246.5" y="253" width="0.0" height="0.0"/>
                                 <fontDescription key="fontDescription" type="boldSystem" pointSize="22"/>
                                 <color key="textColor" red="0.76684117892066839" green="0.76684117892066839" blue="0.76684117892066839" alpha="1" colorSpace="custom" customColorSpace="displayP3"/>
                                 <nil key="highlightedColor"/>
                             </label>
-                            <segmentedControl opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="left" contentVerticalAlignment="top" segmentControlStyle="plain" selectedSegmentIndex="0" translatesAutoresizingMaskIntoConstraints="NO" id="yDf-Ly-a3k">
+                            <segmentedControl opaque="NO" contentMode="scaleToFill" fixedFrame="YES" contentHorizontalAlignment="left" contentVerticalAlignment="top" segmentControlStyle="plain" selectedSegmentIndex="0" translatesAutoresizingMaskIntoConstraints="NO" id="yDf-Ly-a3k">
                                 <rect key="frame" x="301" y="101" width="98" height="32"/>
-                                <color key="backgroundColor" white="0.66666666666666663" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
+                                <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMaxY="YES"/>
+                                <color key="backgroundColor" white="0.33333333333333331" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
                                 <segments>
                                     <segment title="时"/>
                                     <segment title="分"/>
                                     <segment title="秒"/>
                                 </segments>
-                                <color key="selectedSegmentTintColor" white="1" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
+                                <color key="selectedSegmentTintColor" white="0.66666666666666663" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
                             </segmentedControl>
                             <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="计时" textAlignment="natural" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="kHu-8m-66E">
                                 <rect key="frame" x="15" y="96" width="69" height="41"/>
@@ -53,22 +54,8 @@
                                 <color key="textColor" white="1" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
                                 <nil key="highlightedColor"/>
                             </label>
-                            <view contentMode="scaleToFill" translatesAutoresizingMaskIntoConstraints="NO" id="Up2-SV-NfB">
-                                <rect key="frame" x="15" y="234" width="384" height="1"/>
-                                <color key="backgroundColor" white="0.66666666666666663" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
-                                <constraints>
-                                    <constraint firstAttribute="height" constant="1" id="AkJ-Si-SJu"/>
-                                </constraints>
-                            </view>
-                            <view contentMode="scaleToFill" translatesAutoresizingMaskIntoConstraints="NO" id="stF-Hm-XEy">
-                                <rect key="frame" x="15" y="269" width="384" height="1"/>
-                                <color key="backgroundColor" white="0.66666666666666663" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
-                                <constraints>
-                                    <constraint firstAttribute="height" constant="1" id="1m4-H7-HWM"/>
-                                </constraints>
-                            </view>
                             <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="执行" textAlignment="natural" lineBreakMode="tailTruncation" numberOfLines="2" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="T9I-mf-wOK">
-                                <rect key="frame" x="48.5" y="240" width="45" height="26.5"/>
+                                <rect key="frame" x="71" y="240" width="45" height="26.5"/>
                                 <fontDescription key="fontDescription" type="boldSystem" pointSize="22"/>
                                 <color key="textColor" red="0.76684117892066839" green="0.76684117892066839" blue="0.76684117892066839" alpha="1" colorSpace="custom" customColorSpace="displayP3"/>
                                 <nil key="highlightedColor"/>
@@ -80,77 +67,124 @@
                                 <nil key="highlightedColor"/>
                             </label>
                             <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="次" textAlignment="natural" lineBreakMode="tailTruncation" numberOfLines="2" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="kli-UI-BPo">
-                                <rect key="frame" x="344" y="240" width="22.5" height="26.5"/>
+                                <rect key="frame" x="332.5" y="240" width="22.5" height="26.5"/>
                                 <fontDescription key="fontDescription" type="boldSystem" pointSize="22"/>
                                 <color key="textColor" red="0.76684117892066839" green="0.76684117892066839" blue="0.76684117892066839" alpha="1" colorSpace="custom" customColorSpace="displayP3"/>
                                 <nil key="highlightedColor"/>
                             </label>
                             <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="循环" textAlignment="natural" lineBreakMode="tailTruncation" numberOfLines="2" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="5GG-lx-Gu6">
-                                <rect key="frame" x="265.5" y="240" width="45" height="26.5"/>
+                                <rect key="frame" x="254" y="240" width="45" height="26.5"/>
                                 <fontDescription key="fontDescription" type="boldSystem" pointSize="22"/>
                                 <color key="textColor" red="0.76684117892066839" green="0.76684117892066839" blue="0.76684117892066839" alpha="1" colorSpace="custom" customColorSpace="displayP3"/>
                                 <nil key="highlightedColor"/>
                             </label>
+                            <view contentMode="scaleToFill" translatesAutoresizingMaskIntoConstraints="NO" id="GWO-WE-4Fc">
+                                <rect key="frame" x="303" y="766" width="80" height="80"/>
+                                <color key="backgroundColor" red="0.20000000000000001" green="0.38431372549019605" blue="0.20392156862745098" alpha="1" colorSpace="custom" customColorSpace="displayP3"/>
+                                <constraints>
+                                    <constraint firstAttribute="height" constant="80" id="H1m-CS-IwN"/>
+                                    <constraint firstAttribute="width" constant="80" id="b1h-qr-Shl"/>
+                                </constraints>
+                            </view>
+                            <view contentMode="scaleToFill" translatesAutoresizingMaskIntoConstraints="NO" id="gVp-Ir-3kL">
+                                <rect key="frame" x="305" y="768" width="76" height="76"/>
+                                <color key="backgroundColor" white="0.0" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
+                                <constraints>
+                                    <constraint firstAttribute="width" constant="76" id="nES-bw-IRW"/>
+                                    <constraint firstAttribute="height" constant="76" id="qjZ-X1-FIZ"/>
+                                </constraints>
+                            </view>
+                            <view contentMode="scaleToFill" translatesAutoresizingMaskIntoConstraints="NO" id="PQY-cO-PkF">
+                                <rect key="frame" x="31" y="766" width="80" height="80"/>
+                                <color key="backgroundColor" white="0.33333333333333331" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
+                                <constraints>
+                                    <constraint firstAttribute="height" constant="80" id="V9G-Yi-owi"/>
+                                    <constraint firstAttribute="width" constant="80" id="lq3-cC-Hus"/>
+                                </constraints>
+                            </view>
+                            <view contentMode="scaleToFill" translatesAutoresizingMaskIntoConstraints="NO" id="YgB-3O-hDN">
+                                <rect key="frame" x="33" y="768" width="76" height="76"/>
+                                <color key="backgroundColor" white="0.0" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
+                                <constraints>
+                                    <constraint firstAttribute="width" constant="76" id="BIy-wR-byk"/>
+                                    <constraint firstAttribute="height" constant="76" id="Nub-wU-XGZ"/>
+                                </constraints>
+                            </view>
                             <button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="Qjv-ld-sNL">
-                                <rect key="frame" x="35" y="754" width="88" height="88"/>
+                                <rect key="frame" x="35" y="770" width="72" height="72"/>
                                 <color key="backgroundColor" white="0.33333333333333331" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
                                 <constraints>
-                                    <constraint firstAttribute="height" constant="88" id="ZwZ-nR-xUd"/>
-                                    <constraint firstAttribute="width" constant="88" id="mY7-x1-4in"/>
+                                    <constraint firstAttribute="height" constant="72" id="ZwZ-nR-xUd"/>
+                                    <constraint firstAttribute="width" constant="72" id="mY7-x1-4in"/>
                                 </constraints>
                                 <fontDescription key="fontDescription" type="boldSystem" pointSize="18"/>
                                 <state key="normal" title="取消"/>
+                                <connections>
+                                    <action selector="cancelEventTouchUpInside:" destination="BYZ-38-t0r" eventType="touchUpInside" id="iy4-yT-Wlf"/>
+                                </connections>
                             </button>
                             <button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="6xl-uf-8Po">
-                                <rect key="frame" x="291" y="754" width="88" height="88"/>
-                                <color key="backgroundColor" red="0.19906100144962621" green="0.38598508883248728" blue="0.20454248826832538" alpha="1" colorSpace="custom" customColorSpace="displayP3"/>
+                                <rect key="frame" x="307" y="770" width="72" height="72"/>
+                                <color key="backgroundColor" red="0.20000000000000001" green="0.38431372549019605" blue="0.20392156862745098" alpha="1" colorSpace="custom" customColorSpace="displayP3"/>
                                 <constraints>
-                                    <constraint firstAttribute="width" constant="88" id="KlN-Sc-wSu"/>
-                                    <constraint firstAttribute="height" constant="88" id="OMo-KV-yS7"/>
+                                    <constraint firstAttribute="width" constant="72" id="KlN-Sc-wSu"/>
+                                    <constraint firstAttribute="height" constant="72" id="OMo-KV-yS7"/>
                                 </constraints>
                                 <fontDescription key="fontDescription" type="boldSystem" pointSize="18"/>
                                 <state key="normal" title="开始">
-                                    <color key="titleColor" red="0.51572199861849122" green="1" blue="0.52992329026755303" alpha="1" colorSpace="custom" customColorSpace="displayP3"/>
+                                    <color key="titleColor" red="0.51764705882352935" green="1" blue="0.52941176470588236" alpha="1" colorSpace="custom" customColorSpace="displayP3"/>
                                 </state>
+                                <connections>
+                                    <action selector="operatorEventTouchUpInside:" destination="BYZ-38-t0r" eventType="touchUpInside" id="ZQ5-1H-g9x"/>
+                                </connections>
                             </button>
                         </subviews>
-                        <color key="backgroundColor" red="0.10980392160000001" green="0.10980392160000001" blue="0.10980392160000001" alpha="1" colorSpace="calibratedRGB"/>
+                        <color key="backgroundColor" white="0.0" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
                         <constraints>
                             <constraint firstItem="dkn-zj-XIU" firstAttribute="leading" secondItem="hPF-DO-Rzk" secondAttribute="trailing" constant="7.5" id="012-nn-Sy3"/>
                             <constraint firstItem="hPF-DO-Rzk" firstAttribute="centerY" secondItem="8Xd-6t-B0t" secondAttribute="centerY" id="3sJ-iE-kWc"/>
                             <constraint firstItem="kHu-8m-66E" firstAttribute="top" secondItem="6Tk-OE-BBY" secondAttribute="top" constant="52" id="62N-gS-JfV"/>
                             <constraint firstItem="Qjv-ld-sNL" firstAttribute="leading" secondItem="6Tk-OE-BBY" secondAttribute="leading" constant="35" id="6VP-dP-N8q"/>
                             <constraint firstItem="6Tk-OE-BBY" firstAttribute="bottom" secondItem="Qjv-ld-sNL" secondAttribute="bottom" constant="20" id="6ue-vq-FFF"/>
-                            <constraint firstAttribute="trailing" secondItem="stF-Hm-XEy" secondAttribute="trailing" constant="15" id="7bU-n6-5Id"/>
                             <constraint firstItem="13o-bN-7YL" firstAttribute="centerX" secondItem="8bC-Xf-vdC" secondAttribute="centerX" constant="39.5" id="7eJ-r2-XdG"/>
                             <constraint firstItem="8Xd-6t-B0t" firstAttribute="top" secondItem="kHu-8m-66E" secondAttribute="bottom" constant="8" id="BcZ-J2-Mix"/>
+                            <constraint firstItem="Qjv-ld-sNL" firstAttribute="centerY" secondItem="PQY-cO-PkF" secondAttribute="centerY" id="C7L-Y2-fj1"/>
                             <constraint firstItem="13o-bN-7YL" firstAttribute="centerY" secondItem="8Xd-6t-B0t" secondAttribute="centerY" id="CuN-3w-unM"/>
                             <constraint firstItem="kli-UI-BPo" firstAttribute="leading" secondItem="5GG-lx-Gu6" secondAttribute="trailing" constant="33.5" id="D1h-q0-uD7"/>
                             <constraint firstItem="5GG-lx-Gu6" firstAttribute="centerY" secondItem="8Xd-6t-B0t" secondAttribute="centerY" id="G19-l3-Si0"/>
                             <constraint firstItem="hPF-DO-Rzk" firstAttribute="leading" secondItem="T9I-mf-wOK" secondAttribute="trailing" constant="33.5" id="HXN-a6-dY0"/>
+                            <constraint firstItem="Qjv-ld-sNL" firstAttribute="centerY" secondItem="YgB-3O-hDN" secondAttribute="centerY" id="JZX-Uz-BBH"/>
+                            <constraint firstItem="6xl-uf-8Po" firstAttribute="centerY" secondItem="gVp-Ir-3kL" secondAttribute="centerY" id="KpI-Lk-iev"/>
                             <constraint firstItem="dkn-zj-XIU" firstAttribute="centerX" secondItem="8bC-Xf-vdC" secondAttribute="centerX" constant="-27.5" id="N35-Hk-fIW"/>
+                            <constraint firstItem="Qjv-ld-sNL" firstAttribute="centerX" secondItem="YgB-3O-hDN" secondAttribute="centerX" id="NR1-aA-iN7"/>
                             <constraint firstItem="kli-UI-BPo" firstAttribute="centerY" secondItem="8Xd-6t-B0t" secondAttribute="centerY" id="O9C-sc-QGZ"/>
-                            <constraint firstItem="yDf-Ly-a3k" firstAttribute="centerY" secondItem="kHu-8m-66E" secondAttribute="centerY" id="P2e-Au-2O8"/>
                             <constraint firstItem="T9I-mf-wOK" firstAttribute="centerY" secondItem="8Xd-6t-B0t" secondAttribute="centerY" id="PlU-eJ-Ywc"/>
                             <constraint firstItem="6Tk-OE-BBY" firstAttribute="bottom" secondItem="6xl-uf-8Po" secondAttribute="bottom" constant="20" id="Q7U-3i-snq"/>
+                            <constraint firstItem="6xl-uf-8Po" firstAttribute="centerX" secondItem="GWO-WE-4Fc" secondAttribute="centerX" id="QbR-Ld-nLV"/>
                             <constraint firstItem="6Tk-OE-BBY" firstAttribute="trailing" secondItem="6xl-uf-8Po" secondAttribute="trailing" constant="35" id="REI-Uw-I3y"/>
                             <constraint firstItem="5GG-lx-Gu6" firstAttribute="leading" secondItem="13o-bN-7YL" secondAttribute="trailing" constant="7.5" id="UER-90-AZI"/>
-                            <constraint firstItem="stF-Hm-XEy" firstAttribute="top" secondItem="Up2-SV-NfB" secondAttribute="bottom" constant="34" id="Zky-9x-1Kx"/>
-                            <constraint firstItem="stF-Hm-XEy" firstAttribute="leading" secondItem="8bC-Xf-vdC" secondAttribute="leading" constant="15" id="bxy-e2-8ry"/>
-                            <constraint firstAttribute="trailing" secondItem="Up2-SV-NfB" secondAttribute="trailing" constant="15" id="eR1-fA-qUY"/>
                             <constraint firstItem="8Xd-6t-B0t" firstAttribute="centerX" secondItem="8bC-Xf-vdC" secondAttribute="centerX" constant="7.5" id="jGe-kk-M1I"/>
+                            <constraint firstItem="Qjv-ld-sNL" firstAttribute="centerX" secondItem="PQY-cO-PkF" secondAttribute="centerX" id="jSg-kn-13Y"/>
                             <constraint firstItem="kHu-8m-66E" firstAttribute="leading" secondItem="6Tk-OE-BBY" secondAttribute="leading" constant="15" id="qr7-lB-hzT"/>
-                            <constraint firstItem="Up2-SV-NfB" firstAttribute="top" secondItem="kHu-8m-66E" secondAttribute="bottom" constant="97" id="qsQ-c0-05R"/>
-                            <constraint firstItem="Up2-SV-NfB" firstAttribute="leading" secondItem="8bC-Xf-vdC" secondAttribute="leading" constant="15" id="wRY-88-z18"/>
+                            <constraint firstItem="6xl-uf-8Po" firstAttribute="centerY" secondItem="GWO-WE-4Fc" secondAttribute="centerY" id="reu-4D-Un9"/>
+                            <constraint firstItem="6xl-uf-8Po" firstAttribute="centerX" secondItem="gVp-Ir-3kL" secondAttribute="centerX" id="t3Q-Gz-CKQ"/>
                             <constraint firstItem="dkn-zj-XIU" firstAttribute="centerY" secondItem="8Xd-6t-B0t" secondAttribute="centerY" id="xQU-gD-lJs"/>
-                            <constraint firstItem="6Tk-OE-BBY" firstAttribute="trailing" secondItem="yDf-Ly-a3k" secondAttribute="trailing" constant="15" id="zL8-1C-4DI"/>
                         </constraints>
                         <viewLayoutGuide key="safeArea" id="6Tk-OE-BBY"/>
                     </view>
                     <connections>
-                        <outlet property="cancelButton" destination="Qjv-ld-sNL" id="oc9-1L-ZlP"/>
-                        <outlet property="controlButton" destination="6xl-uf-8Po" id="wqf-VW-hIJ"/>
                         <outlet property="pickView" destination="8Xd-6t-B0t" id="wK1-Iw-6Kg"/>
+                        <outlet property="segmentedControl" destination="yDf-Ly-a3k" id="czB-NI-ewo"/>
+                        <outletCollection property="circles" destination="GWO-WE-4Fc" id="fsu-1k-hEj"/>
+                        <outletCollection property="circles" destination="gVp-Ir-3kL" id="qPW-aM-by7"/>
+                        <outletCollection property="circles" destination="PQY-cO-PkF" id="lGi-jq-Gpd"/>
+                        <outletCollection property="circles" destination="YgB-3O-hDN" id="5Fo-er-nQV"/>
+                        <outletCollection property="circles" destination="Qjv-ld-sNL" id="0wJ-4D-y0Z"/>
+                        <outletCollection property="circles" destination="6xl-uf-8Po" id="scJ-gX-xrh"/>
+                        <outletCollection property="labels" destination="13o-bN-7YL" id="A4w-cr-5w2"/>
+                        <outletCollection property="labels" destination="hPF-DO-Rzk" id="jFa-XM-jOT"/>
+                        <outletCollection property="operators" destination="GWO-WE-4Fc" id="EM7-ga-Ogp"/>
+                        <outletCollection property="operators" destination="6xl-uf-8Po" id="Hl5-DQ-gqJ"/>
                     </connections>
                 </viewController>
                 <placeholder placeholderIdentifier="IBFirstResponder" id="dkx-z0-nzr" sceneMemberID="firstResponder"/>
diff --git a/SQIntervalTimer/SQIntervalTimer/ViewController.m b/SQIntervalTimer/SQIntervalTimer/ViewController.m
index 49c04436..1f83eb71 100644
--- a/SQIntervalTimer/SQIntervalTimer/ViewController.m
+++ b/SQIntervalTimer/SQIntervalTimer/ViewController.m
@@ -9,24 +9,46 @@
 #import "ViewController.h"
 
 @interface ViewController ()<UIPickerViewDataSource, UIPickerViewDelegate>
-@property (strong, nonatomic) NSMutableArray *dataSource;
+@property (strong, nonatomic) IBOutletCollection(UIView) NSArray *circles;
+@property (strong, nonatomic) IBOutletCollection(UIView) NSArray *operators;
+@property (strong, nonatomic) IBOutletCollection(UILabel) NSArray *labels;
 @property (weak, nonatomic) IBOutlet UIPickerView *pickView;
-@property (weak, nonatomic) IBOutlet UIButton *controlButton;
-@property (weak, nonatomic) IBOutlet UIButton *cancelButton;
+@property (weak, nonatomic) IBOutlet UISegmentedControl *segmentedControl;
+@property (strong, nonatomic) NSMutableArray *dataSource;
 @end
 
 @implementation ViewController
 
 - (void)viewDidLoad {
     [super viewDidLoad];
+    [self loadData];
+    [self configureView];
+}
+
+- (void)loadData {
     self.dataSource = [NSMutableArray array];
-    for (NSUInteger i = 1; i <= 60; i++) {
-        [self.dataSource addObject:@(i).stringValue];
+    NSMutableArray *actions = [NSMutableArray array];
+    for (NSUInteger i = 0; i <= 60; i++)
+        [actions addObject:@(i).stringValue];
+    [self.dataSource addObject:actions];
+    NSMutableArray *breaks = [NSMutableArray array];
+    for (NSUInteger i = 1; i <= 60; i++)
+        [breaks addObject:@(i).stringValue];
+    [self.dataSource addObject:breaks];
+    NSMutableArray *times = [NSMutableArray array];
+    for (NSUInteger i = 1; i < 100; i++)
+        [times addObject:@(i).stringValue];
+    [self.dataSource addObject:times];
+    for (UIView *view in self.circles) {
+        view.layer.cornerRadius = view.bounds.size.width * 0.5;
+        view.layer.masksToBounds = YES;
     }
-    self.controlButton.layer.cornerRadius = self.controlButton.bounds.size.width * 0.5;
-    self.controlButton.layer.masksToBounds = YES;
-    self.cancelButton.layer.cornerRadius = self.cancelButton.bounds.size.width * 0.5;
-    self.cancelButton.layer.masksToBounds = YES;
+}
+
+- (void)configureView {
+        [self.segmentedControl addTarget:self action:@selector(segmentedControlValueChanged:) forControlEvents:(UIControlEventValueChanged)];
+    self.segmentedControl.selectedSegmentIndex = 1;
+    [self segmentedControlValueChanged:self.segmentedControl];
 }
 
 - (UIStatusBarStyle)preferredStatusBarStyle {
@@ -34,15 +56,36 @@ - (UIStatusBarStyle)preferredStatusBarStyle {
 }
 
 - (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView {
-    return 3;
+    return self.dataSource.count;
 }
 
 - (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component {
-    return self.dataSource.count;
+    NSArray *rows = self.dataSource[component];
+    return rows.count;
 }
 
 - (NSAttributedString *)pickerView:(UIPickerView *)pickerView attributedTitleForRow:(NSInteger)row forComponent:(NSInteger)component {
-    return [[NSAttributedString alloc] initWithString:self.dataSource[row] attributes:@{NSForegroundColorAttributeName : [UIColor whiteColor]}];
+    return [[NSAttributedString alloc] initWithString:self.dataSource[component][row] attributes:@{NSForegroundColorAttributeName : [UIColor whiteColor]}];
+}
+
+- (void)segmentedControlValueChanged:(UISegmentedControl *)sender {
+    for (UILabel *label in self.labels) {
+        label.text = @[@"时", @"分", @"秒"][sender.selectedSegmentIndex];
+    }
+}
+
+- (IBAction)operatorEventTouchUpInside:(UIButton *)sender {
+    for (UIView *operator in self.operators) {
+        operator.backgroundColor = [UIColor colorWithRed:133 / 255. green:85 / 255. blue:32 / 255. alpha:1];
+        if ([operator isKindOfClass:UIButton.class]) {
+            UIButton *button = (UIButton *)operator;
+            [button setTitle:@"暂停" forState:UIControlStateNormal];
+            [button setTitleColor:[UIColor colorWithRed:255 / 255. green:182 / 255. blue:62 / 255. alpha:1] forState:UIControlStateNormal];
+        }
+    }
+}
+
+- (IBAction)cancelEventTouchUpInside:(UIButton *)sender {
 }
 
 @end