How can I make this animation work? - swift

Question

I was trying to animate a set of images using this tutorial: https://www.geekylemon.com/animated-loading-screen. I converted the code from objective c to swift in order to implement it into another project, but it seems like it doesn't work properly.
Well, on the the storyboard are three Image Views(AnitmationimageView beeing the same with "L1.png", Loadimageview and the background image of the view controller). I wanted to run the AnitmationimageView and after it a transition to L1,2,3,4 images and after them to Loadimageview and after it to the background image. But when I run the program it only shows me the transition from AnitmationimageView to Loadimageview and the transition from Loadimageview to the background image. Hope this helps in "diagnosing" my problem.
class ViewController: UIViewController {
#IBOutlet weak var AnitmationimageView: UIImageView!
#IBOutlet weak var Loadimageview: UIImageView!
var loading_1: UIImage!
var loading_2: UIImage!
var loading_3: UIImage!
override func viewDidLoad() {
super.viewDidLoad()
AnitmationimageView.animationImages = [UIImage(named: "L1.png"), UIImage(named: "L2.png"), UIImage(named: "L3.png"), UIImage(named: "L4.png")] as? [UIImage]
AnitmationimageView.animationRepeatCount = 1
AnitmationimageView.animationDuration = 3 as CFTimeInterval
AnitmationimageView.startAnimating()
perform(#selector(self.delay1), with: nil, afterDelay: 3)
delay1()
delay2()
delay3()
}
#objc func delay1() {
UIView.beginAnimations(nil, context: nil)
UIView.setAnimationDuration(1.0)
AnitmationimageView.alpha = 0
UIView.commitAnimations()
perform(#selector(self.delay2), with: nil, afterDelay: 1.0)
}
#objc func delay2() {
UIView.beginAnimations(nil, context: nil)
UIView.setAnimationDuration(1.0)
Loadimageview.alpha = 1
UIView.commitAnimations()
perform(#selector(self.delay3), with: nil, afterDelay: 1.5)
}
#objc func delay3() {
UIView.beginAnimations(nil, context: nil)
UIView.setAnimationDuration(1.0)
Loadimageview.alpha = 0
UIView.commitAnimations()
}
}