Even though this is labeled 2020 this is work done in 2002 or earlier if I'm not mistaken. And I've seen many articles, videos, and interactive versions over th

Even though this is labeled 2020 this is work done in 2002 or earlier if I'm not mistaken. And I've seen many articles, videos, and interactive versions over the years. Very cool! https://web.archive.org/web/20130422193857/http://escherdroste.math.leidenuniv.nl/index.php?menu=intro https://web.archive.org/web/20130422193857/http://escherdros...