I used to do a lot of programming in Flash and ActionScript, and you can see a lot of my older work at flashandmath.
I have a Ph.D. in mathematics, with computer programming coming later in life. Because of my background, my coding experiments often have an overt mathematical nature, but not always. Sometimes I just like to make something pretty.
As for the name of the blog, RectangleWorld? The domain name was just as ridiculous as it was available. But everything we see in the HTML Canvas takes place in a rectangle in a rectangular browser window, displayed on your rectangular computer monitor. So there you go – welcome to RectangleWorld!