Do you like number? Pattern? Dance? Motion? Math? Animation? Unusual websites?
Visit this website: http://www.datapointed.net/visualizations/math/factorization/animated-diagrams/ (embedded below)
This blog post describes how the animation came to be created (don't miss this link, mentioned at the beginning of the post, where the coding behind the animation is explained). Click through to the web page, so that you can watch the animation in a larger version.
Thanks to Math Thinking for the links.