import UIKit

class ViewController: UIViewController {

    @IBOutlet weak var blueView: UIView!
    @IBOutlet weak var greenView: UIView!

    var isBlue = true

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view.
    }


    @IBAction func changeBackgroundColorOnTapped(_ sender: Any) {

         var AquaColor = blueView.backgroundColor
        if isBlue == true {
            blueView.backgroundColor = greenView.backgroundColor
        } else {
            greenView.backgroundColor = UIColor(red: 0/255.0, green: 128/255.0, blue: 255/255.0, alpha: 1)
        }
        isBlue = !isBlue



    }
    @IBAction func didBeginPanGesture(_ sender: UIPanGestureRecognizer) {
        var point = sender.location(in: view)
        blueView.center = CGPoint(x: point.x, y: point.y)
    }
}