This is the introduction. It shows you this real time cellular automata, and you can draw in it with the mouse. There's Life, then there's Brian's Brain. And you can draw in any of them. And there are interesting initial configurations, like the heat rule.
Heat diffusion is good to start with a circle in the middle.
And then you can always draw. Now the editor lets you fill it with random numbers, and heat diffusion does a good job on that. So here's a graphics editor, and I can paste this image into my graphics editor, and go in there and do neat stuff with it. I can bring this into my graphics environment, and I can take this structured PostScript graphic, this Royal Pine Car Freshner, and then I can take it back over here to the Cellular Automata Machine, and then paste it in. Then I can copy that back out.