OTCA metapixel (2010)

A video depicting a glider moving in metapixels.<p><a href="https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=xP5-iIeKXE8" rel="nofollow">https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=xP5-iIeKXE8</a><p>See also, Gemini, self-replicating ship going the path of universal constructor: <a href="http:&#x2F;&#x2F;www.conwaylife.com&#x2F;wiki&#x2F;Gemini" rel="nofollow">http:&#x2F;&#x2F;www.conwaylife.com&#x2F;wiki&#x2F;Gemini</a>

I remember getting really meta with this. I think golly came with a script that took a pattern as an input and outputed the pattern encoded as metapixels. I of course fed it the definition of the metapixel. The result is a metapixel implemented in metapixels. This is surprisingly fast to simulate because of the Hash Life algorithm which optimises that sort of thing incredibly well.