Frankly, I'd like to have a detailed online course to teach me how to create something like this including annotated code, exercises, the works. If I ever learn

Frankly, I'd like to have a detailed online course to teach me how to create something like this including annotated code, exercises, the works. If I ever learn enough to do it myself, I'm going to teach my kids. A spectacular demonstration of the creative possibilities of this new medium! Thanks for creating it.