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Not quite what you mean, but they do have a code visualiser:

http://orbit.bonsaijs.org/

He/she is wanting a GUI tool for creating HTML5/JavaScript graphics and animations. I think his best bet right now is following Adobe's efforts with Edge, as someone else mentioned.

For Orbit we were working on some new features which allows you to hotswap code while you are typing / dragging and dropping things on the visual representation. See https://vimeo.com/53017149 for a little preview. Maybe that is something he/she wants :)

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