Macroscopic description of Langton's loop. (a) Growth of loop colony;
File:Langton Loops after replication.gif - Wikimedia Commons
Cellular automaton - Wikipedia
Are there any 2D cellular automata that generate non-random looking patterns? If so, what are they so I can learn how to generate them? - Quora
Cellular automaton - Wikipedia
Langton's Loops: The cellular automaton that copies itself
golly/src/Rules/Langtons-Loops.table at master · jimblandy/golly · GitHub
Chapter 3
File:Golly Langton Loops.png - Wikimedia Commons