<command arg="-root"/>
- <video href="http://www.youtube.com/watch?v=PaG7RCO4ezs"/>
+ <video href="https://www.youtube.com/watch?v=PaG7RCO4ezs"/>
<hgroup>
<vgroup>
values in their path. Then, as they pass over changed pixels, their
behavior is influenced.
-http://en.wikipedia.org/wiki/Langton%27s_ant
-http://en.wikipedia.org/wiki/Turing_machine
+https://en.wikipedia.org/wiki/Langton%27s_ant
+https://en.wikipedia.org/wiki/Turing_machine
Written by David Bagley; 1997.
</_description>