Graffiti on computer screen

I am a fan of graffiti. I never imagined that the most interesting part of the graffiti, the motion can be captured using a markup language. GML (Graffiti Markup Language) is a universal, XML-based, open file format designed to store graffiti motion data (x coordinates, y coordinates and time) thanks to EvanRoth and team.
Mozilla hosted a website(www.markup.mozilla.org) dedicated for this new markup language.You can create and share your graffiti markups here.

Graffiti created by me on the mozilla's markup site you can play the motion of this graffiti here.

This site uses canvas HTML5 element and javascript to capture the graffiti motion and create a GML file.
Note: I am not sure whether this website works in browsers other than FireFox.

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GRAFF: The Art & Technique of Graffiti, Graffiti World (Updated Edition): Street Art from Five Continents, Graffiti Planet: The Best Graffiti from Around the World, Wall and Piece