it is inpressive but a bit to big

A very impressive piece of work! Few engineers can take on a project of that complexity.

Go "backstage". I placed a button above every cell. Pressing the button will set the cell to "live".
By backstage I mean behind the grid, upstairs.
Then hit the on-off lever. It will continue calcualting until you set it back to off. It will then finish clalculating the current step and stop.
To empty the field press the "clear" button left of the grid.

Interesting...how does one play?