http://animationsequence.com/

“The Animation Sequence Project is an unique co-creation project featuring the world’s greatest animation artists.

Creative minds from all over the world are invited to create a short piece of animation. The only requirement for the content of the animation is that it starts and ends with a 250 pixel square in the exact middle of the screen.

The square then can become anything you want. A box, a character, a building, a circle, and it can tell its own little story. Absolutely anything, as long as it is a square again within 10 seconds.”