     }
 
     override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
-            // when user touches a button, turn it light blue
+        // when user touches a button, turn it light blue
 
         for touch in touches {
             let location = touch.locationInNode(self)

        // positions it with respect to top left

        colorNode.position = position
        x += WidthOfScreen / 3

        colorNode.name = "topButton"

        // ~~~~
        // image node
        var imageUrl = ""
        if x == WidthOfScreen / 3 {
            imageUrl = "flat"
        } else {
            imageUrl = "sharp"
        }

        let imageNode = SKSpriteNode(texture: SKTexture(imageNamed: imageUrl), size: buttonSize)
        imageNode.anchorPoint = anchorPoint
        imageNode.position = position



    func makeTopButton(buttonColor: SKColor, buttonSize: CGSize) {
        let anchorPoint = CGPoint(x: 0, y: 0)
        let position = CGPoint(x: x, y: screenHeight - (screenWidth/2))

        // ~~~~
        // color node
