Here y'are!
I know it's a bit complex, but, eh, that's just what I do, I can't help it. ^_^; The individual patterns for each colour is really simple, but layered together it looks complex (a technique I use a lot).
Also, I always though the head was a skull, so I made it a skull (and then painted the jaw blood-red), hope you don't mind.
I saved it as an interlaced PNG file, so if you save it, then you should be able to see the layers on something like Photoshop. Just in case you want to.
