为什么图表不显示？

Question

我正在尝试显示此流程图 Can I create a flow chart (no tree chart) using D3.js

http://codepen.io/naveennsit/pen/jWaEYX?editors=101 它不显示

var connectedObject=[
{from:'0', to:'1', label:''}, 
{from:'1', to:'3', label:''}, 
{from:'3', to:'2', label:'No'}, 
{from:'3', to:'4', label:'Yes'},
{from:'2', to:'5', label:'Yes'},
{from:'2', to:'6', label:'No'},
{from:'4', to:'7', label:'No'},
{from:'4', to:'8', label:'Yes'},
{from:'5', to:'9', label:''},
{from:'6', to:'9', label:''},
{from:'7', to:'9', label:''},
{from:'8', to:'9', label:''}
];

var objectSource={
0:{'name':'Start',color:'green'}, 
1:{'name':'Read A,B,C',color:'yellow'}, 
2:{'name':'Is B>C?',color:'green'},
3:{'name':'Is A>B?',color:'green'},
4:{'name':'Is A>C?',color:'green'},
5:{'name':'Print B',color:'green'},
6:{'name':'Print C',color:'green'},
7:{'name':'Print C',color:'green'},
8:{'name':'Print A',color:'green'},
9:{'name':'End',color:'red'}
}

任何更新？