When the orange number is 1, that means that you can click on tiles to make them alive. If a block has less than 2 or more than 3 neighbors, that means it will die next turn. If it has 2 or 3 neighbors (anything more or less will not suffice), it will survive. If a dead tile (white) has 3 neighbors, it will be resurrected. Press space to advance to the next turn.
[ok so apparently some things like gliders weren't possible. I fixed some stuff and had to remove a few other things, but now it works. it's also now 15x15, i recommend using turbo mode to load it all in (shift click right flag)] Just a little simulation made 100% by me, Curated on 2/13/17. Thanks so much @FUZZIE-WEASEL Ba