  
  - layers: Provide the layers for the parallax button.
  - shadowColor: Provide the dominant colour of your background for an even better shadow.
+ - parallaxIntensity: A value between 0 and 2 (the subtle default is 0.6). Change for a more pronounced parallax effect.
  */
 public class TVButton: UIButton, UIGestureRecognizerDelegate {
     

            self.layer.shadowColor = shadowColor!.CGColor
        }
    }
    
    public var layers : [TVButtonLayer]? {
        didSet {

        UIView.animateWithDuration(animationDuration, delay: 0.0, options: UIViewAnimationOptions.CurveEaseOut, animations: { () -> Void in
            self.layer.transform = combinedTransform
            self.specularView.alpha = 0.3
            self.specularView.center = point
            }, completion: nil)
        for var i = 1; i < self.containerView.subviews.count ; i++ {
            let subview = self.containerView.subviews[i]
            if subview != self.specularView {
                subview.center = CGPointMake(self.bounds.size.width/2 + xTranslation*CGFloat(i)*self.parallaxIntensity, self.bounds.size.height/2 + yTranslation*CGFloat(i)*self.parallaxIntensity)
            }
        }
    }
    
    func exitMovement() {
