Use Periodic boundaries
Set or Clear a cell at a custom location.
This option creates a full sized view, suitable for printing, in a new window.
To animate enter an interval (in milliseconds) and press "start".
Larger sizes will run more slowly.
The starting patern includes a glider and a blinker, if you choose a square starting pattern and periodic boundaries the glider will eventually collide with the blinker and intersting things will happen, the exact outcome depending on the size of the grid.
(c) John Whitehouse 2014 - 2020