Here's a quick sketch I've created while waiting to get sleepy. This is Donatello, he is the tech-savy Teenage Mutant Ninja Turtle. I have drawn the Turtles a few times lately, I guess I like how colorful they are. I use a sepia toned brush tip marker and Prismacolor markers. The sketch paper really helped soak up the colors and allow for some layering of hues. I am not too worried about the presentation of this piece, due to it just being a sketch so I chose to leave it uncropped. I'll probably be doing some more of these little sketches so be on the look out.