Snap! I've been doing the very same since Turbo Pascal back in the 80s. I'm recently trying to get to grips with Android, hence I present: https://play.google.com/store/apps/details?id=com.singlemost..., if I may be so bold. It's had precisely zero downloads since its publication a week ago, which has itself been a lesson. Hopefully I'm not too out of order running it past some cellular automata enthusiasts on this thread.