Tixy tutorial – Match visual patterns with JavaScript

I love tixy.land, but as a school teacher of maths and computer science I think it may be a bit beyond most of my students. So with permission from Martin Kleppe, I created this guided tutorial to get to grips with the power of this simple 'creative code golfing'.

Note: the whole page is one <9kB request... I take pride in keeping bloat out of the web.