Hey there, sorry for the late reply! =(
Well, if you know your way around JavaScript, then it’d be pretty trivial to setup something very similar. I’m using the "2d" context of the HTML5 <canvas /> for all the 3-D work. Think of it as a 1-D array of bytes, where each 4-byte group represents a color (with 4 distinct channels that make up a pixel: red, green, blue, and alpha) at the corresponding pixel. At each frame I’m filling up that array and handing it over to the <canvas /> for it to actually display on the screen.
If what you’re looking for is to get into 3-D math, then my ultimate advice would be to use a pen and paper to try to come up with solutions by yourself, and only resort to looking up solutions online if you’re stuck. 3-D math is a journey you have to go through on your own. (Or you can follow along a tutorial or two, and speed up the process in the expense of not totally understanding the underlying theory of linear algebra.)