Love it. Triggers memories! I wrote my own similar-ish version of this for a school project in 1991. Although mine wasn’t mono, so I could draw in foreground c

Love it. Triggers memories! I wrote my own similar-ish version of this for a school project in 1991. Although mine wasn’t mono, so I could draw in foreground colour, preserving the existing text, background colour or text. Eg draw a filled in square made up only of background colour changes. Obviously this is very different but I love the sense of surprisingly good output despite a lot of restrictions.