             view:pageControl,
             toView:self)
         
-        addConstraints(constraintsEffect)
+        addConstraints(constraintsBlur)
         addConstraints(constraintsCollection)
         
         addConstraints([

        backgroundColor = UIColor.clear
        self.controller = controller as? CHelp
        
        let blurEffect:UIBlurEffect = UIBlurEffect(style:UIBlurEffectStyle.extraLight)
        let visualEffect:UIVisualEffectView = UIVisualEffectView(
            effect:blurEffect)
        visualEffect.isUserInteractionEnabled = false
        visualEffect.translatesAutoresizingMaskIntoConstraints = false
        visualEffect.clipsToBounds = true
        
        let button:UIButton = UIButton()
        button.backgroundColor = UIColor.genericLight

        addSubview(pageControl)
        addSubview(button)
        
        let constraintsBlur:[NSLayoutConstraint] = NSLayoutConstraint.equals(
            view:blur,
            toView:self)
        
        let constraintsCollection:[NSLayoutConstraint] = NSLayoutConstraint.equals(
