 
     lazy var backgroundImageView: UIImageView = {
         let view = UIImageView()
-        view.backgroundColor = UIColor.lightGrayColor()
+        view.backgroundColor = UIColor.blueColor()
         return view
     }()
 

            let centerY = stackView.centerYAnchor.constraintEqualToAnchor(centerYAnchor)
            NSLayoutConstraint.activateConstraints([centerX, centerY])
        }
    }
}



        let views = [
            "backgroundImageView": backgroundImageView,
        ]

        do {
