override func viewDidLoad() {
    super.viewDidLoad()

    let pastelView = PastelView(frame: view.bounds)

    // Custom Direction
    pastelView.startPastelPoint = .bottomLeft
    pastelView.endPastelPoint = .topRight

    // Custom Duration
    pastelView.animationDuration = 3.0

    // Custom Color
    pastelView.setColors([UIColor(red: 156/255, green: 39/255, blue: 176/255, alpha: 1.0),
                          UIColor(red: 255/255, green: 64/255, blue: 129/255, alpha: 1.0),
                          UIColor(red: 123/255, green: 31/255, blue: 162/255, alpha: 1.0),
                          UIColor(red: 32/255, green: 76/255, blue: 255/255, alpha: 1.0),
                          UIColor(red: 32/255, green: 158/255, blue: 255/255, alpha: 1.0),
                          UIColor(red: 90/255, green: 120/255, blue: 127/255, alpha: 1.0),
                          UIColor(red: 58/255, green: 255/255, blue: 217/255, alpha: 1.0)])

    pastelView.startAnimation()
    view.insertSubview(pastelView, at: 0)
}