Conway’s rule: a cell is born with exactly 3 live neighbours and survives with 2 or 3. A newborn takes the majority colour of its three parents, or the fourth colour if all three differ.
Tap to drop an R-pentomino. The same ?seed= always gives the same run.
LITConway’s Life (B3/S23) with QuadLife colour inheritance. Every generation the count of living cells must equal the previous count + births − deaths, or the page throws.
AMBERThe four colours are four of the 8 q.d colours.