It is interesting to note that there are tiles with which one can simulate a Turing machine. The tiles can tile the plane iff the TM never stops.<p><a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Wang_tile" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Wang_tile</a>