func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
// Override point for customization after application launch.
self.window = UIWindow(frame: UIScreen.main.bounds)
self.window?.backgroundColor = UIColor.white
self.window?.makeKeyAndVisible()
self.window?.rootViewController = UIViewController()
let redView = UIView(frame: CGRect(x: 107, y: 268, width: 200, height: 200))
redView.backgroundColor = UIColor.red
redView.tag = 200
self.window?.addSubview(redView)
redView.layer.cornerRadius = 100
let yellowView = UIView(frame: CGRect(x: 132, y: 293, width: 150, height: 150))
yellowView.backgroundColor = UIColor.yellow
yellowView.tag = 201
self.window?.addSubview(yellowView)
yellowView.layer.cornerRadius = 75
let blueView = UIView(frame: CGRect(x: 157, y: 318, width: 100, height: 100))
blueView.backgroundColor = UIColor.blue
blueView.tag = 202
self.window?.addSubview(blueView)
blueView.layer.cornerRadius = 50
