text: 
  
  var props = {showSpheres: true, showBase: true, showLabels: true,};
  
  var datGui = new dat.GUI();
  
  var controls = [];
  
  function initializeGui(scene) {
  
      controls[0] = datGui.add(props, 'showSpheres')
                  .name('Show Spheres')
                  .listen();
  
      controls[0].onChange(
              function(newValue) {
                  controlSpheres(scene, newValue);
              });
  
      controls[1] = datGui.add(props, 'showBase')
                  .name('Show Base Triangle')
                  .listen();
  
      controls[1].onChange(
              function(newValue) {
                  controlBaseTriangle(scene, newValue);
              });
  
      controls[2] = datGui.add(props, 'showLabels')
                  .name('Show Point Labels')
                  .listen();
  
      controls[2].onChange(
              function(newValue) {
                  controlPointLabels(scene, newValue);
              });
  }