     var pageControl: UIPageControl!
     var backButton: UIButton!
     var forwardButton: UIButton!
-    //var signInButton: UIButton!
 
     var bgColors = [UIColor]()
 
     private var scrollView: IntroOverlayScrollView!
 
     var slideVerticalScaleFactor: CGFloat = 1.0
+
+    var arrow: UIImageView?
 
     override func viewDidLoad() {
         view.backgroundColor = UIColor.whiteColor()

        }
    }

    var arrow = UIImageView(image: UIImage(named: "screen_5_arrow"))

    func scrollViewDidScroll(scrollView: UIScrollView) {

    }

    private func colorForPercentage(percentage: CGFloat, start: UIColor, end: UIColor) -> UIColor {
        let s = start.components
        let e = end.components
        let newRed   = (1.0 - percentage) * s.red   + percentage * e.red
        let newGreen = (1.0 - percentage) * s.green + percentage * e.green
        let newBlue  = (1.0 - percentage) * s.blue  + percentage * e.blue
        return UIColor(red: newRed, green: newGreen, blue: newBlue, alpha: 1.0)
    }

    private func setActiveIntroView(newIntroView: UIView, forPage page: Int) {
        if introView != newIntroView {
            UIView.animateWithDuration(IntroViewControllerUX.FadeDuration, animations: { () -> Void in

                make.bottom.equalTo(pageControl)
                make.centerX.equalTo(pageControl)
            }

            UIView.animateWithDuration(0.2) {
                self.arrow.alpha = 1.0
                self.pageControl.alpha = 0
