Drawing square at the center of the view

FallingSquareViewController.swift

    @IBOutlet var animationView: UIView!
    var squareView:UIView!

    override func viewDidLoad() {
        super.viewDidLoad()
        drawSquare()
    }
    
    func drawSquare(){
        let squareSize = CGSize(width: 30.0, height: 30.0)
        let centerPoint = CGPoint(x: self.animationView.bounds.midX - (squareSize.width/2), y: self.animationView.bounds.midY - (squareSize.height/2))
        let frame = CGRect(origin: centerPoint, size: squareSize)
        squareView = UIView(frame: frame)
        squareView.backgroundColor = UIColor.orangeColor()

        animationView.addSubview(squareView)
    }