Create interactive animations like on ciechanow.ski?

I've admired animations like the ones on [1] and I'd like to create some myself.

What tool/library would you pick?

Looking at the source of the above site [2], the author seems to hand-craft them using the canvas API, but man, that seems really difficult/cumbersome.

[1] https://ciechanow.ski/gps [2] https://ciechanow.ski/js/gps.js