diff --git a/pymo/viz_tools.py b/pymo/viz_tools.py
index b7f7fa9..f753e56 100644
--- a/pymo/viz_tools.py
+++ b/pymo/viz_tools.py
@@ -91,7 +91,7 @@ def draw_stickfigure3d(mocap_track, frame, data=None, joints=None, draw_names=Fa
                     y=parent_y + 0.1,
                     z=parent_z + 0.1,
                     s=joint,
-                    color='rgba(0,0,0,0.9')
+                    color='rgba(0,0,0,0.9)')
 
     return ax
 
@@ -233,4 +233,4 @@ def nb_play_mocap(mocap, mf, meta=None, frame_time=1/30, scale=1, camera_z=500,
     url = '%s?&cz=200&order=xzyi&frame_time=%f&scale=%f'%(base_url, frame_time, scale)
     iframe = '<iframe frameborder="0" src=' + url + ' width="100%" height=500></iframe>'
     link = '<a href=%s target="_blank">New Window</a>'%url
-    return IPython.display.HTML(iframe+link)
\ No newline at end of file
+    return IPython.display.HTML(iframe+link)