title: Why does this babylon.js OnPickTrigger only run once?
body: <p>I got the mesh to spin and change colour. But this only works once (unless I refresh the page). I would like it to spin and change colour every time it gets clicked on. I somehow expected this would be the default behaviour. How do I make that happen?</p>
  
  <p>Link to <a href="https://playground.babylonjs.com/#27KY6R" rel="nofollow noreferrer">the playground</a>. </p>
  
  <pre><code>var createScene = function () {
  
      // This creates a basic Babylon Scene object (non-mesh)
      var scene = new BABYLON.Scene(engine);
  
      // This creates and positions an arc rotate camera (non-mesh)
      var camera = new BABYLON.ArcRotateCamera("Camera", BABYLON.Tools.ToRadians(90), BABYLON.Tools.ToRadians(90), 5, new BABYLON.Vector3(0, 0, 0), scene);
      camera.attachControl(canvas, false);
  
      // This creates a light, aiming 0,1,0 - to the sky (non-mesh)
      var light = new BABYLON.HemisphericLight("light", new BABYLON.Vector3(0, 1, 0), scene);
  
      // Default intensity is 1. Let's dim the light a small amount
      // light.intensity = 0.7;
  
      //Creates a new standard material and sets the diffuse color to blue.
      var newMaterial = new BABYLON.StandardMaterial;
      newMaterial.name = "newMaterial";
      newMaterial.diffuseColor = new BABYLON.Color3(0.81, 0.14, 0.14);
  
      // Let's look at how we can load custome assets.
      // var sphere = BABYLON.MeshBuilder.CreateSphere("sphere", {diameter: 2, segments: 32}, scene);
      // sphere.material = newMaterial;
  
  
      // var sphere = BABYLON.SceneLoader.ImportMesh("", "https://raw.githubusercontent.com/BabylonJS/MeshesLibrary/master/", "shaderBall.glb", scene);
      // sphere.material = newMaterial;
  
      BABYLON.SceneLoader.ImportMesh("", "https://raw.githubusercontent.com/BabylonJS/MeshesLibrary/master/", "shaderBall.glb", scene, function(newMeshes){
  
          var sphere = newMeshes[0].getChildMeshes()[0];
  
          sphere.material = newMaterial;
  
          sphere.actionManager = new BABYLON.ActionManager(scene);
  
          sphere.actionManager.registerAction(
              new BABYLON.InterpolateValueAction(
                  BABYLON.ActionManager.OnPickTrigger,
                  light,
                  'diffuse',
                  BABYLON.Color3.Random(),
                  1000
              )
          );
  
          sphere.actionManager.registerAction(
              new BABYLON.InterpolateValueAction(
                  BABYLON.ActionManager.OnPickTrigger,
                  sphere,
                  'rotation',
                  new BABYLON.Vector3(Math.PI*10, Math.PI*10, Math.PI*10),
                  1000
              )
          );
  
      });
  
      return scene;
  
  };
  </code></pre>