Animated Rug
Saw a beautiful rug at http://islamandart.tumblr.com/post/47334157323. More info and an animated gif at http://mathhombre.tumblr.com/post/47378241170/saw-this-beautiful-rug-at-islam-and-art-and
Like the tessellation in it, but I also loved the inferred motion. So I made the tessellation to animate.
On edit you can change the shapes. Step 1 lets you see how they are put together, and Step 2 shows the full effect.