From the name we can figured out what graffiti creator is? Yups, graffiti creator is a very simple flash application, but can produce an "amazing" work. To make a graffiti design is quite easy, we do not have any good pictures or designs, which is required here is a willingness to learn. And, maybe later can make a more cool than mine, which is important is learn and practice.
Here's a preview of work with graffiti creator software: