Long ago (1998?) I had a cool screen saver of little creatures that would fight, grow, eat things, reproduce, and evolve. The creatures were just geometric shap

Long ago (1998?) I had a cool screen saver of little creatures that would fight, grow, eat things, reproduce, and evolve. The creatures were just geometric shapes made up of 5-10 lines or so in a 2D world. The evolution worked because there were a few types of lines (like plant, eating-things, defense, reproduction, motion) and each creature had genetic instructions for how to create it like "draw a line of X type that's Y long, then turn Z degrees, then go to the next instruction". You could also set parameters like how strong the sun was and how fast they grew and see how that affected the evolution. Anyway, it was pretty awesome and I would love to see an updated version or something similar.