Abstract: In this paper we introduce Deco, a powerful framework for procedural design that shipped in Adobe Flash Pro CS4 through CS6 and in Adobe Photoshop CS6. The Deco framework generates complex patterns from a small number of input parameters and models encoded as JavaScript objects, all stored in text files called scriptals. The object's methods define local growth and behavior or the rendering of the pattern. A collection of libraries simulate global interactions between the resulting structure and the environment. In addition, an artist can interactively control both the procedural growth and the resulting pattern or structure.