var DIR = '';

    var nodes = null;
    var edges = null;
    var graph = null;

    function draw() {
      // create people
      nodes = [
        <!-- begin_friends_item -->
        {delimiter_friends}{id: {user_id}, label: '{user_name}', image: '{url_files}{user_photo}', shape: 'image', fontSize: 12, fontFace:'Tahoma,Verdana,sans-serif'}
        <!-- end_friends_item -->
      ];

      edges = [
        <!-- begin_relations_item -->
        {delimiter_relations}{from: {from_user_id}, to: {to_user_id}, value: {activity}, color: {color:'{color}', highlight:'{color_set}'}}
        <!-- end_relations_item -->
      ];

      // create a graph
      var container = document.getElementById('mygraph');
	  var data = {
        nodes: nodes,
        edges: edges,
      };
      var options = {width: '748px',
                     height:'700px',
                     physics: {barnesHut: {enabled: false},
                     repulsion: {nodeDistance: 47, springLength: 162, springConstant: 0.00022, damping: 1}}
                    };
	  clustering: true;
      graph = new vis.Network(container, data, options);
    }