[karam]

Sweet. Thanks for making this. It'd be awesome if you could extend the animation and show examples of complex shapes you could make with triangles.

[aaronem]

It'd be even more awesome if you could actually make complex shapes with these triangles.

[svachalek]

You can. It just requires absolute positioning. I can't see why you'd want to though, it's not hard enough to be fun or useful enough to be work.

[mbq]

And if you try this, you will usually get light segments in places where triangles forming some shape meet (due to antialiasing and overall hackery).