title: How to change material color for only one object in THREE.js
body: <p>I'm editing a program wrote in Three.js and Tween.js. I try to find the solution here and on the web, without results.
  I have a lot of object (cones) create by THREE.Mesh and there is a little script that every 5 second select one of these and change, for few time, its dimension.
  I would like change also the color, but i have some problems. If i try to change the color, this change for every object, but i want that change only for the object selected by the script.</p>
  
  <p>this is the code to create the objects:</p>
  
  <pre><code>VIS.createCityMarkers = function( cities ){
  
    var material = new THREE.MeshPhongMaterial({
        color: 0xffdb85,
        specular: 0xff6c00,
        shininess: 3,
        shading: THREE.FlatShading
   });
  
  var baseMesh = new THREE.Mesh( new THREE.CylinderGeometry( 0.2, 0.0, 0.4, 32, 1 ), material );
  baseMesh.geometry.applyMatrix( new THREE.Matrix4().makeRotationX( -Math.PI * 0.5 ) );
  
  var cityLookup = {};
  
    var group = new THREE.Group();
    _.each( cities, function( cc, name ){
    var g = new THREE.Group();
    var m = baseMesh.clone();
    g.add( m );
    var p = Coordinates.latLongToVector3( cc.lat, cc.long + 90, 10.8 );   
    g.position.copy( p );
    g.lookAt( group.position );
    m.name = name;
    group.add( g );
    cityLookup[ name ] = m;
  });
  </code></pre>
  
  <p>This is the function that change the dimension of selected object (m):</p>
  
  <pre><code>function highlightCityMesh(m){
  
    var s = {
      scale: 1.0,
      up: 0.0,
      color: 0xffdb85
    };
    new TWEEN.Tween( s )
    .to({
      scale: 3.0,
      up: 2.0,
      color: 0xc00000
    }, 2000 )
    .easing( TWEEN.Easing.Elastic.Out )
    .onUpdate( function(){
      m.scale.set( s.scale, s.scale, s.scale );
      m.position.z = -s.up;
      m.material.color.setHex(s.color);
    })
    .start();
  
    m.update = function(){
      this.rotation.z = Date.now() * 0.001;
    };
  }
  </code></pre>
  
  <p>Thank you</p>