Chord Diagram
JS Bin // source http://jsbin.com/xacawi
JS Bin // source http://jsbin.com/xacawi
// source https://jsbin.com/koturi/8
// source https://jsbin.com/koturi/6
// source http://jsbin.com/jimava/5
JS Bin // source http://jsbin.com/xacawi
JS Bin // source http://jsbin.com/xacawi
JS Bin // source http://jsbin.com/xacawi