C3 Sleep Graph 
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Chart to visualize sleep data.

A [Pen](http://codepen.io/topher6345/pen/YXrOXY) by [Christopher Saunders](http://codepen.io/topher6345) on [CodePen](http://codepen.io/).

[License](http://codepen.io/topher6345/pen/YXrOXY/license).