Shared Drawing Canvas in Cloud9

Simon has discovered a very powerful online editor (featuring over 40 languages): Cloud9. You can find it at

Simon got himself an account and tried out his first project in this new environment – a Shared Drawing Canvas, from a coding challenge by Daniel Shiffman. It’s a bout creating a Node.js server and having several canvases communicating to one another and drawing the same stuff simultaneously.

He got stuck trying to view his project (the preview didn’t function in the secured port) and came up with an idea to incorporate an alternative port in his code and then downloaded the code and run it locally.


Roughly how much code Simon had to write (mind the number of folders on the left):



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