"Sometimes programming is beautiful. I wrote this program in high school on a weekend -- purely by accident. I thought to myself: Why don't I try to program a simulation of gravity? That sounds pretty fun. Make every particle move towards every other particle... and see what happens. Surely they will all just collapse on a single point. It seems like that would be the most logical thing for them to do. So I tried that, and to my surprise, they began to form little chains..."