Draw using the mouse. Sorry, you can't save yet.
This runs the algorithm called "The game of life"
The rules are:
An empty cell will be filled ("born") if at least 3 of its neighbors
are filled.
A live cell will die if it has less than 2 live neighbors (it dies from
loneliness), or if there are more than 3 live neighbors (too crowded).
You can use the mouse to fill and clear cells and there are settings
for the zoom factor and speed. Also a run/stop button.