The squares with colours placed next to each other. From a distance, you see it is part of a bigger image. We know it as pixel art. Maybe you can see pixels as the basics of the screen culture.
Also born when screens appeard is pixel art. Drawings made out of the little squares they call art. Eboy is one fine artist who made it famous. Within the pixel art are different ways from very pointy to almost realistic you all can watch it on pixeljoint.com
The big network Habbo is also fully built in pixel art. Yes indeed the world is square.