True party coding.
This demo was made on the SpectraVideo 318 (pre-MSX version) in 2 hours. It featured random lines drawing on the screen causing quantization blocks to appear and switch colours over time as there can only be a certain number of colours in an 8 x 8 block.
The demo was hardcoded at the party into RAM, then powered off before the organisors had a chance to save it to tape. Oh well - maybe next year the SpectraVideo will live on!