Quiero que cuando comiencen los toques, el jugador (círculo rojo) se mueva al lado opuesto del camino circular. Ya hice que el jugador siga un camino, pero no he encontrado respuesta a mi pregunta en internet.

    override func didMoveToView(view: SKView) {

    player = SKSpriteNode(imageNamed: "circulo")
    player.position = CGPoint(x: self.frame.width / 2, y: self.frame.height / 2 - 170)
    player.color = colorGris
    player.colorBlendFactor = 1
    player.size = CGSize(width: 25, height: 25)
    self.addChild(player)
    player.zPosition = 3

   }
   override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
   /* Called when a touch begins */

    if gameStarted == false {

        gameStarted = true
        moveClockWise()
        movingClockWise = true

    }

       }



   func moveClockWise(){



    let dx = player.position.x - self.frame.width / 2
    let dy = player.position.y - self.frame.height / 2

    let rad = atan2(dy, dx)

    path = UIBezierPath(arcCenter: CGPoint(x:self.frame.width / 2, y: self.frame.height / 2) , radius: 170, startAngle: rad, endAngle: rad + CGFloat(M_PI * 4), clockwise: true)

    let follow = SKAction.followPath(path.CGPath, asOffset: false, orientToPath: true, speed: 200)
    player.runAction(SKAction.repeatActionForever(follow).reversedAction())

}