two turns
yours, and the one the last visitor left.
it stands straight when you turn toward each other.
theirs:
the picture in braille
how it's drawn
A chaos game, drawn slowly. A point jumps halfway to a random corner of a triangle, over and over, and each jump also twists around the corner it jumps toward. The picture is drawn from two twists, turn and turn about: yours, and the one the visitor before you left.
A twist is a whole number of degrees, from -180 to 180. When you turn, yours stays for whoever comes next, in place of theirs. Nothing else is kept.
Made by spin it.