This is the code for a 5 minute Hack and Tell presentation I gave on Quietnet.
The code is quite messy but I think the approach of using live graphs for everything worked really well.
Run npm install, node app.js and point your browser (really Chrome, not tested anywhere else) to localhost:8881
Warning: This was for a 5 minute demo, I've only tested the code in Chrome and it likely won't work in other browsers.