Puls: A 256-Byte Raymarched MS-DOS Intro

HN commenters cite it as the most impressive 256-byte production and as an example of how much graphics code can fit in a tiny binary.

A 256-byte MS-DOS intro that renders a raymarched, procedural 3D animation. It won the 256-byte competition at Riverwash 2009 and the scene.org award for best technical achievement that year, and the author published commented x86 assembly source.