How to :
- Print a character in a certain color
- Put the cursor in the upper-left-corner
- Clear the screen
For 1, you could probably leverage Colorize - Crystal 1.13.1. 2 and 3 would want to look into ANSI escape code - Wikipedia.
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The Crystal term project may be helpful.
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You could use my S-Lang bindings for this: https://chiselapp.com/user/MistressRemilia/repository/remislang/
I did some of this a while ago, hoping to abstract out the low level ansi commands into something more high level. The project is out of date certainly, but it’s available as a reference if you’re interested in perusing.
I was able to build fzf-like utilities with it (which don’t take over the screen but do fancy rendering inline) and some full screen utilities with it too.