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If you're not familiar with it, Quil is a Clojure wrapper for Processing. I personally strongly prefer using Clojure over Java, so I'm happy that Quil exists. However, it can be a little tricky to set up, so I wrote a quick guide to starting with Quil here: http://www.tylerlhobbs.com/writings/using-quil-for-artwork
Let me know if you have any questions!