I’d totally put these up on my walls, but I may end up climbing them:
I made them by taking 32×32 pixel tiles of random grey noise, Atkinson dithering them (using pamditherbw) then vectorizing them using potrace. If you click on the tiles, you can download/view the PDF source of each.
(pgmnoise, the source of the grey noise, relies heavily on the system time as its seed. Before I introduced a delay between image generation, several images appeared almost identical.)