Do not know what to code

What does /prog/ do when it's bored and doesn't have any idea on what to code?

I have no ideas for any programs that I or someone else would find useful really, but I am so bored.

What do?

OP, create a terrain engine, like in http://www.youtube.com/watch?v=gSOQGazo7Oo

more realistic with 3d fluid simulation.