c-squares written in the C language will render random coloured rectangulars in the terminal, while the font, speed, density, color, ratio and number of the shapes drawn are fully costumizable.
Every time a rectangular is complete, a new one starts to take shape.
Is it? I thought a script is a portable and instantly grokkable piece of code that can be easily modified by others, since it uses very little actual code in itself (e.g. by being reliant on larger imported frameworks), and thus not being a full-fledged application.
The above code is pretty much self-contained, and though it is impressively minimal, it is not instantly grokkable, and I would have a hard time modifying it.