Black/White

I once took an art class in which we had to grab a piece of black paper and a white pencil and color in/out everything that would not be colored if we were working in gray or silver pencil. The lines we created would be made up of negative space, and they were supposed to form the reality. Unfortunately, my painting came out distorted; I couldn't bring myself to leave the extra alone, because I know how hard it is to miss something you can't get back.