Move SKSpriteNode by Bezier Curve Path

BezierCurveMove

func BezierCurveMove(screenSize: CGSize, node: SKSpriteNode) {
        let size   = node.size
        var cgpath = CGPathCreateMutable()
        
        //random values
        let xStart = Utility.randInRange(Int(size.width)...Int(screenSize.width-size.width))
        let xEnd   = Utility.randInRange(Int(size.width)...Int(screenSize.width-size.width))
        
        //ControlPoint1
        let cp1X   = Utility.randInRange(Int(size.width)...Int(screenSize.width-size.width))
        let cp1Y   = Utility.randInRange(Int(size.width)...Int(screenSize.width-size.height))
        
        //ControlPoint2
        let cp2X   = Utility.randInRange(Int(size.width)...Int(screenSize.width-size.width))
        let cp2Y   = Utility.randInRange(0...cp1Y)
        
        let s      = CGPointMake(CGFloat(xStart), screenSize.height + size.height)
        let e      = CGPointMake(CGFloat(xEnd), -node.size.height)
        let cp1    = CGPointMake(CGFloat(cp1X), CGFloat(cp1Y))
        let cp2    = CGPointMake(CGFloat(cp2X), CGFloat(cp2Y))
        CGPathMoveToPoint(cgpath, nil, s.x, s.y)
        CGPathAddCurveToPoint(cgpath, nil, cp1.x, cp1.y, cp2.x, cp2.y, e.x, e.y)
        
        let anim   = SKAction.followPath(cgpath, asOffset: false, orientToPath: true, duration: 10)
        let remove = SKAction.removeFromParent()

        node.runAction(SKAction.sequence([anim, remove]))
    }