func motionTracking()
 {
      if motionManager.accelerometerAvailable {

      let queue = NSOperationQueue()

      motionManager.startAccelerometerUpdatesToQueue(queue,
      withHandler: {(data: CMAccelerometerData!, error: NSError!) in

      self.XCoordSlider.setValue(Float(data.acceleration.x), animated: true)
      self.YCoordSlider.setValue(Float(data.acceleration.y), animated: true)

      println("Y: (self.YCoordSlider.value)")
      println("X: (self.XCoordSlider.value)")

       })

    }

    else
    {
        println("Accelerometer not available")
    }
}

self.XCoordSlider.setValue(Float(data.acceleration.x), animated: true)