This is an entry for @MaterArc's contest. To be honest: I cheated... xD I just took an image and wrote a python program to convert it to the 14 different colors you're allowed to use. Basically, it's allowed: I just used the 14 colors and grid size 1. I could have drawn this without cheating, but... That would take some time... xD
I don't want to win with this (but it would be cool if i do, lol), I just wanted to see if this method to render images works. :)