If you are not familiar with the program it looks a little like this. 

You are given a simple choice of brush size, the color, and the opacity. (whatever that means) You then draw a picture. As you can see, its even hard to draw good looking letters.

But some people take it the next step. Some people are actually good at drawing graffiti. Granted most of these people have a pen to draw these with....but still they do these drawings in this simple programs. 

(I will embed them so you can watch how they drew them.)

Heres my favorite one. 

Looks real right?

Wrong

Amazing huh? Well theres more.

Probably my second is this one if michael phelps. 

Heres how he did it.

Both those were done by the game guy. 

I'll show you one more, and whenever I see some more good ones, I just randomly post them at the end of my blogs. 

Heres how they did it. 

Simply amazing. Hope you guys enjoyed these as much as I did.