It’s common to have to draw the same kinds of icons over and over — many different apps and websites use similar glyphs, but each instance typically needs to be tweaked for size and style, so they need to be redrawn.
Due to this repetition, I’ve always been interested in trying to work out optimal ways to create them. This is to save time, but also as a fun challenge.
If you’re a designer you’ll likely find these short animations informative. If you’re not a designer you’ll likely find them to be interesting, with a hint of magic.