A Game of Life

All controls are visible when you click on the "?" button at the top right of the screen.
EDIT : Wait actually I forgot to specify that you can draw with the left click of the mouse, and erase with the right click.

By reducing the speed (with the "-" key) you can draw directly when the simulation is playing, this is pretty funny to do (and it looks quite beautiful).

Unfortunately, the FPS on web browser are limited to around 60...
So if you want to have the fastest possible simulation, download the windows executable, and get above 2000 FPS (for real).