Directions:

Click play (there's a full screen!)
Type in a rule into the rule box (look below for some fun ones!)
Click the top row of cells (so the very top of the light grey section, one square should turn black)
Watch how it propagates!

Fun rules!

rule 18, 22, 26, 60... - are all sierpiński's triangle
rule 30 - entually leads to randomness, so it's used to make psuedo-random numbers (they're not totally random because you could recreate them if you had the starting conditions). it also has a similar appearance to the shell of the Conus textile snail!
rule 90 - is sometimes called the "simplest, non-trivial cellular automaton" as it is just the XOR function
rule 110 - is turing complete, meaning it can simulate the logic of any computer alogirthm! it lies on the boundry of order and chaos (just like me, when programming this)
rule 184 - is used as a model of traffic flow in a single lane, surface deposition, and ballistic annihilation

Issues:

The cells on the sides of the canvas needs to query cells outside of the canvas. Right now, this just returns a dead cell even if the cell would normally would be alive. This leads to inaccurate graphs:

Games like ECA!