Simon wrote this JavaScript code for Langton’s Ant (a type of Cellular Automaton) himself, inspired by Daniel Shiffman’s description/version in Processing (Java) during the Coding Train live stream on January 5.
Link to Simon’s sketch: http://alpha.editor.p5js.org/simontiger/sketches/rJeKLICmM
Simon later also made a pixel level version: http://alpha.editor.p5js.org/simontiger/sketches/rJeKLICmM
And a version with multiple ants: http://alpha.editor.p5js.org/simontiger/sketches/r1Ry_FQ4M
(Simon also loves the Numberphile video about how Langton’s Ant works and forms a mysterious “highway” after a certain number of moves).
Geeks out of the box 