Every time the CA is run (press R to restart with random initial states), it goes through three stages:
- Contrasts. Spots that are on average a tiny bit lighter become lighter, and the same goes for darker spots.
- Advance of the Light Spots. Generally, spots that are light enough become white. Dark spots become smaller.
- Rectangles. Now, the dark spots strike back. They expand until they are rectangular.
I made two versions: a simple monochromatic, and one with three colors, which is actually just like running 3 separate CA's at the same time, but it looks cooler.
Anyway, please tell me what you think.