Star Challenge
A nice programming finger exercise for in between
The mission of last year's "Vintage Computing Christmas Challenge" was to write a program that prints a star on the screen that is made up of individual *-characters. Here is a possible solution in Commodore C64 Basic, neither optimized for size nor speed, but rather for readability.
On my GitHub page you can find more solutions, e.g. as assembler or as a C implementation.
My GitHub repository for the Star Challenge
As we all know, Christmas is coming soon, so it will be interesting to see what the challenge will be this year.