is an old AS2 experiment that i made some time ago
the rules are:
1. Any live cell with fewer than two neighbours dies, as if by loneliness.
2. Any live cell with more than three neighbours dies, as if by overcrowding.
3. Any live cell with two or three neighbours lives, unchanged, to the next generation.
4. Any dead cell with exactly three neighbours comes to life.
download the source files and and try different grid inputs