Thinkful - Logic Drills Traffic light.md

Description:

You're writing code to control your town's traffic lights. You need a function to handle each change from green, to yellow, to red, and then to green again.

Complete the function that takes a string as an argument representing the current state of the light and returns a string representing the state the light should change to.

For example, when the input is green, output should be yellow.

Solution:

function updateLight(current) {
  if(current === "green") {
    return "yellow";
  } else if(current === "yellow") {
      return "red";
  } else if(current === "red") {
      return "green";
  }
}