Wlofie, via MeLinkedInstaMyFaceBookWeInGramSpace, sent me to A Mind is Born [1], a 2½ minute demo program (a program that display some mind-blowing graphics and music) done on the Commodore 64 [2]. The impressive thing here isn't that it's done on the C-64, nor the graphics, nor the music, but that he did all that in less than 256 bytes!
For reference, the above paragraph is 351 bytes in size (or 521 if you include the HTML (HyperText Markup Language) markup). That is inconceivable to me that one can even do something like that with so little.
Inconveivable [3]!
[1] https://linusakesson.net/scene/a-mind-is-born/
[2] https://en.wikipedia.org/wiki/Commodore_64