   var animator: UIDynamicAnimator?
   var gravity: UIGravityBehavior?
   var collision: UICollisionBehavior?
+  
+  var panGesture: UIPanGestureRecognizer?
   
   override func viewDidLoad() {
     super.viewDidLoad()

    // Add gravity to the animator
    self.animator!.addBehavior(self.gravity)
    self.animator!.addBehavior(self.collision)
  }
  
  override func didReceiveMemoryWarning() {

    // Dispose of any resources that can be recreated.
  }
  
  func panning(pan: UIPanGestureRecognizer) {
    
  }
}
