Hitomezahi Stitching
Been itching to make this since Day 14 of Annie Perkins AWESOME #mathartchallenge. This is called both Hitomezahi or De Brujin Stitching.
Day 14 tweet: https://twitter.com/anniek_p/status/1244220881347502080
Home for the challenge: https://arbitrarilyclose.com/home/