     
     func start() {
         loadBackground()
+        loadScoreBackground()
         loadScore()
         loadTip()
         leftStack = loadStacks(false, startLeftPoint: nextLeftStartX)

        willSet {
            let scoreBand = childNodeWithName("score") as? SKLabelNode
            scoreBand?.text = "\(newValue)"
        }
    }
    

        addChild(scoreBand)
    }
    
    func loadScoreBackground() {
        let back = SKShapeNode(rect: CGRectMake(0-120, 1024-200-30, 240, 140), cornerRadius: 20)
        back.zPosition = 50
        back.fillColor = SKColor.blackColor().colorWithAlphaComponent(0.3)
        addChild(back)
    }
    
    func loadHero() {
        let hero = SKSpriteNode(imageNamed: "human1")
        hero.name = HeroName
