Each image is a still from an animation of the growth of a cellular automaton. The images are in chronological order, but are not successive iterations. Most cellular automata use grids of square cells, but I like to experiment with other types of grid, too. Here, each cell is an equilateral triangle.

See the animated version here: https://www.patreon.com/user?u=96769447&fan_landing=true&view_as=public

Visit my YouTube channel for more: https://www.youtube.com/channel/UCcJUjwyJLFoghlkGOTY_1Kw

Learn about sandpiles and cellular automata here: https://www.youtube.com/watch?v=1MtEUErz7Gg&t=882s

The cells are colour-coded according to the numerical values contained in them: Red = 0, Black = 1, Yellow = 2.

The automaton reaches a stable, unchanging end-state when all cells have a numerical value less than 3.