Another incredibly good and interactive exposition on Beziers

https://ciechanow.ski/curves-and-surfaces/

His blogs always hit the top of the front page for good reasons.

He also has an older article on the same topic: https://ciechanow.ski/drawing-bezier-curves/.

Wow what a treat. Thanks for sharing this link. Outstanding.

I discovered this primer a few years back (I'm pretty sure it was here on HN) and it was an excellent read!