<command arg="-root"/>
+ <video href="https://www.youtube.com/watch?v=tOLzz_D4-0E"/>
+
<hgroup>
<vgroup>
<number id="delay" type="slider" arg="-delay %"
visualize the rotation, it uses a different color for the edges of
each face. Don't think about it too long, or your brain will melt.
-http://en.wikipedia.org/wiki/Hypercube
-http://en.wikipedia.org/wiki/Tesseract
-http://en.wikipedia.org/wiki/Regular_polytope
+https://en.wikipedia.org/wiki/Hypercube
+https://en.wikipedia.org/wiki/Tesseract
+https://en.wikipedia.org/wiki/Regular_polytope
Written by Joe Keane, Fritz Mueller, and Jamie Zawinski; 1992.
</_description>