 
             physics_body.affectedByGravity = false
             physics_body.allowsRotation = false
+
 
             s.physicsBody = physics_body
             self.addChild(s)

    let sprite1 = SKSpriteNode(color: UIColor(red: 1.0, green: 0.0, blue: 0.0, alpha: 1.0), size: CGSize(width: 10, height: 10))
    let sprite2 = SKSpriteNode(color: UIColor(red: 0.0, green: 1.0, blue: 0.0, alpha: 1.0), size: CGSize(width: 10, height: 10))
    let sprite3 = SKSpriteNode(color: UIColor(red: 0.0, green: 0.0, blue: 1.0, alpha: 1.0), size: CGSize(width: 10, height: 10))

    override func touchesBegan(touches: NSSet, withEvent event: UIEvent) {
        /* Called when a touch begins */

        //        self.addChild(myLabel)
        let center = CGPoint(x:CGRectGetMidX(self.frame), y:CGRectGetMidY(self.frame))

        for s in [sprite1, sprite2, sprite3, sprite4] {
            s.xScale = 3
            s.yScale = 3
            s.position = center
