Challenge: Parting Clouds

 is a programming challenge in the Intro to JS section. This challenge practices using variables and incrementing techniques for animation.

Steps
There are three steps in this challenge:
 * 1) Change the variables: This step asks users to change the   and   variables so the clouds cover the sun.
 * 2) Animate the clouds: This step asks users to use incrementing techniques to make the clouds move one pixel at a time.
 * 3) Make the sun bigger: This step asks users to use incrementing techniques to make the sun bigger two pixels at a time.

If users get stuck
If users get stuck, they should:
 * Pay attention to Oh Noes and the error messages.
 * Go back to the "Animation basics" tutorial.