That's nifty! I spent a while trying to figure out how it worked before realizing it's a Voronoi diagram. Simple yet beautiful.

I thought the same thing...

Kinda neat hovering the mouse around and watching the little "." move the white part. Unfortunately, they cost me some extra work. I began to realize how many times I have sneezed with the laptop on my lap without cleaning the screen ... I kept seeing dots that weren't there and had to break out the wipes.