         }
     }
 
-    // MARK: - Actions
+    // MARK: Actions
 
     @IBAction func adjustBrightness(sender: UIPanGestureRecognizer) {
         if lightOn {


                UIView.animateWithDuration(1.0, animations: { [unowned self] in
                    self.brightnessLabel.alpha = 0.0
                    })

            case .Cancelled, .Failed:
                resetBrightness()

        adjustLight()
    }

    // MARK: Helper functions

    private func adjustLight() {
        // Adjust screen brightness.
