Change image at the end

        CATransaction.begin()
        let animation = CABasicAnimation(keyPath: "position")
        animation.toValue = NSValue(cgPoint: CGPoint(x: self.view.bounds.width - 100, y: self.view.bounds.height - 100))
        animation.fromValue = NSValue(cgPoint: position)
        animation.duration = 5
        animation.isRemovedOnCompletion = false
        animation.fillMode = kCAFillModeForwards
        CATransaction.setCompletionBlock({
            self.airplane.layer.position = CGPoint(x: self.view.bounds.width - 100, y: self.view.bounds.height - 100)

            self.airplane.image = UIImage(named: "crash")
        })
        self.airplane.layer.add(animation, forKey: nil)
        CATransaction.commit()