Each cell holds one of the 8 q.d states. A cell in state s moves to s+1 (mod 8) when at least θ neighbours are already in s+1. State 7 gives way to state 0, closing the wheel.
Tap to scramble a patch and watch it get swallowed. The same ?seed= always gives the same run.
LITGriffeath’s cyclic cellular automaton. Each step checks that no cell skips a state, and the page throws if one does.
AMBERThe 8 states are the site’s q.d colours; the CA is agnostic.