Infinite Chocolate

Author:
Ben Sparks
Topic:
Geometry
Explore the infinite chocoloate paradox (as seen in this video: http://youtu.be/nEct0Z9xE6A or https://www.facebook.com/video.php?v=554083064700378) All pieces should be draggable. There are two "versions" of the chocolate bar for a reason... :)
Try rearranging the pieces in the left version to make it look like the right version. Do the same with the right version to go back to the left version. Can you explain how the video is made?