func applyGradient(colours: [UIColor]) -> Void {
        let gradient: CAGradientLayer = CAGradientLayer()
        gradient.frame = self.bounds
        gradient.colors = colours.map { $0.cgColor }
        self.layer.insertSublayer(gradient, at: 0)
    }

func applyGradientToView(){
        let firstColor = UIColor(red: 26/255, green: 169/255, blue: 186/255, alpha: 1.0)
        let secondColor = UIColor(red: 26/255, green: 97/255, blue: 157/255, alpha: 1.0)
        let thirdColor = UIColor(red: 27/255, green: 65/255, blue: 144/255, alpha: 1.0)
        self.applyGradient(colours: [firstColor, secondColor, thirdColor])
    }