Construction of a <a href="https://en.wikipedia.org/wiki/Danzer_set" class="extiw" title="w:Danzer set">Danzer set</a> from overlaid rectangular grids of aspect ratio 1:1, 1:9, 1:81, etc.
<a href="//commons.wikimedia.org/wiki/User:David_Eppstein" class="mw-redirect" title="User:David Eppstein">David Eppstein</a>
<span class="int-own-work" lang="en">Own work</span>