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//See: https://www.raywenderlich.com/169004/calayer-tutorial-ios-getting-started

func cgColor(red: CGFloat, green: CGFloat, blue: CGFloat) -> CGColor {
  return UIColor(red: red/255.0, green: green/255.0, blue: blue/255.0, alpha: 1.0).cgColor
}

let gradientLayer = CAGradientLayer()
gradientLayer.frame = someView.bounds
gradientLayer.colors = [cgColor(red: 209.0, green: 0.0, blue: 0.0),
                        cgColor(red: 255.0, green: 102.0, blue: 34.0),
                        cgColor(red: 255.0, green: 218.0, blue: 33.0),
                        cgColor(red: 51.0, green: 221.0, blue: 0.0),
                        cgColor(red: 17.0, green: 51.0, blue: 204.0),
                        cgColor(red: 34.0, green: 0.0, blue: 102.0),
                        cgColor(red: 51.0, green: 0.0, blue: 68.0)]

gradientLayer.startPoint = CGPoint(x: 0, y: 0)
gradientLayer.endPoint = CGPoint(x: 0, y: 1)
someView.layer.addSublayer(gradientLayer)