Setting a Custom UIView inside other UIView

settingViewsFrames.swift

func settingViewsFrames() {
        let v1 = UIView(frame: CGRect(x: 113, y: 111, width: 132, height: 194))
        v1.backgroundColor = UIColor(red: 1, green: 0.4, blue: 1, alpha: 1)
        v1.clipsToBounds = true
        
        let v2 = UIView(frame: CGRect(x: 10, y: 10, width: 112, height: 174))
        v2.backgroundColor = UIColor(red: 0.5, green: 1, blue: 0, alpha: 1)
        
        let v3 = UIView(frame: CGRect(x: 43, y: 197, width: 160, height: 230))
        v3.backgroundColor = UIColor(red: 1, green: 0, blue: 0, alpha: 1)
        
        
        self.view.addSubview(v1)
        v1.addSubview(v2)
        self.view.addSubview(v3)
    }