like the game of life ( http://en.wikipedia.org/wiki/Conway's_Game_of_Life ) but you can input to it while running by drawing on it with the mouse. i suppose drawing on a given pixel will XOR its current value. you can also create a game by drawing while it's not running. ability to draw an it can be disabled per-game. actually, i have made a GoL implementation in Python, I wouldn't be surprised if I implemented this idea. https://github.com/inhahe/gameoflife