This image was made for the "Time Slices" demo I made for the STNICCC 2015 demo party.

Normally when connected to a monochrome monitor this machine can only display black and white over 640x400 pixels.

In the demo I'm cheating by swapping very fast between two complementary pictures resulting in a pretty stable 3 levels of grey picture.

This is the top view of a Commodore 128 (with the weird shape converted out so it looks effectively rectangular instead of trapezoidal shaped).