cid = 1', cid:1, color:'orange'},
    {id: 7,  label: 'cid = 1', cid:1, color:'DarkViolet', font:{color:'white'}},
    {id: 8,  label: 'cid = 1', cid:1, color:'lime'},
    {id: 9,  label: 'cid = 1', cid:1, color:'orange'},
    {id: 10, label: 'cid = 1', cid:1, color:'lime'}
  ];

  // create an array with edges
  var edges = [
    {from: 1, to: 2},
    {from: 1, to: 3},
    {from: 10, to: 4},
    {from: 2, to: 5},
    {from: 6, to: 2},
    {from: 7, to: 5},
    {from: 8, to: 6},
    {from: 9, to: 7},
    {f