Whilst I have made it simple, it's a bit messy and I'll tidy it up soon! The idea was inspired by the way the menu is on this site: http://lab.hakim.se/radar/ and I just had to recreate my own. Absolutely love the effect!
Animation with particles inspired by physics formulas, such as gravitation and inertia. Bigger orbs swallow smaller ones, but if they get too much mass, they explode in smaller orbs.
Quick math game using CSS counters and specified increments. No JavaScript.
Blog post: [Fun Times with CSS Counters](http://codersblock.com/blog/fun-times-with-css-counters/)
双面胶