Visit either the Nemisys: Graffiti Wall, Zewall, or Graffiti Playdo websites that are listed in the "Resources" section of this article. Each of these websites offer virtual graffiti art tools for free to all of their visitors.
Click on the type of background that you wish to paint. On the Zewall website, you have options such as "Pink Floyd Street," "Temple Street," and "Scott Heron Blvd." You will be directed to a virtual canvas that reflects your choice. The Nemisys and Graffiti Playdo websites do not offer an option to change the background, but they provide you with a bricked wall, on which you spray virtual paint.
Start painting your creations. Click on the "To the Graffiti Wall" link on the middle of the Nemisys website to access the virtual painting environment. Click on the spray can icons on either the Zewall or Nemisys website to access the painting tool. If you are using Graffiti Playdo, hover your mouse over the wall to make the spray can appear. Click and drag your mouse to begin painting on the background, until you are satisfied with your results.