     presentationController.add(slides)
   }
 
-  func addScene() {
+  func configureBackground() {
     let images = ["Cloud1", "Cloud2", "Cloud1"].map { UIImageView(image: UIImage(named: $0)) }
 
     let content1 = Content(view: images[0], position: Position(left: -0.3, top: 0.2))
     let content2 = Content(view: images[1], position: Position(right: -0.3, top: 0.22))
     let content3 = Content(view: images[2], position: Position(left: 0.5, top: 0.5))
 
-    presentationController.addToScene([content1, content2, content3])
+    presentationController.addToBackground([content1, content2, content3])
 
     presentationController.addAnimations([
       TransitionAnimation(content: content1, destination: Position(left: 0.2, top: 0.2)),

      return true
  }

  func addSlides() {
    let font = UIFont(name: "ArialRoundedMTBold", size: 42.0)!
    let color = UIColor.whiteColor()
    let paragraphStyle = NSMutableParagraphStyle()

      presentationController.navigationItem.leftBarButtonItem = leftButton
      presentationController.navigationItem.rightBarButtonItem = rightButton

      configureSlides()
      configureBackground()

      window = UIWindow(frame: UIScreen.mainScreen().bounds)
      window?.rootViewController = navigationController
