Couple of images I did for our ZOO 2022 demoscene event. These are both made for Commodore 64, the other one is PETSCII using the 256 character set with one global colour (dark grey) and one chaning colour for each 8 x 8 px char. The other one is more developed mode QCH (quarter char hires) that allows to use two colours for each 8 x 2 px block in resolution of 320 x 200 px. C64 has a fixed palette of 16 colours in total.
If you want to try out these on your breadbox or emulator, you can find the PRG-files in here and here.
Down below some workstage animations just to show how these were made. Handmade TM.
Tommi Musturi 