There is a version with even less blocks! https://scratch.mit.edu/projects/1317689074/ Press space or click to switch circuits 7 blocks according to the rules of the challenge 10 blocks if only the code for switching circuits and resetting the ant are removed. The circuit still works if saved with the ant at the right position. 28 blocks including everything
At first I made Langton's ant, then I reduced the block count even further and now this isn't Langton's ant anymore. The only color that the ant detects is black, the wires could be any other color. Only the wires where the ant is going upwards need to be covered, but the other wires can be covered, too. All data is stored in the sprite and the pen, there are no lists and variables If the Stage would have an infinite area and the memory cells would repeat infinitely, then this would be Turing complete.
