Now you can try run it yourself: https://github.com/hamoid/Processing-Workshop-Tool
node.js + socket.io are cool! I built a small tool to be used in workshops, which allows typing and running Processing code, allows seeing in real time what everybody else in the class is typing, running their programs, it includes a chat, and allows "raising your hand" for questions. With it I can even write Processing programs on my smart phone :)
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