         
     }
     
-    //MARK: White StatusBar : better look
+    //MARK: White StatusBar : just for a better look
     override func preferredStatusBarStyle() -> UIStatusBarStyle {
         return .LightContent
     }

            completion: { finished in
                self.secondElapse = self.secondElapse! + 1
                self.lastPosToReach = self.backImageTrailingConstraint.constant
                println("      ... 1 sec elapsed" +
                        "\ncurrent constraint constant : \(self.lastPosToReach)" +
                        "\ncurrent time elapsed since animation started in this direction : \(self.secondElapse)" +
                        "\n")
                
            }
        )

        {
            if letimer.valid
            {
                println("\ntimer1 is in valid state while resume\n")
            }
        }
        else
        {
            println("\ntimer1 is nil, let's start again after a little break at home\n")

            //all is OK let's start another timer :
            timer1 = NSTimer(timeInterval: 1.0, target: self, selector: Selector("AnimationBackGroundParSeconde"), userInfo: nil, repeats: true)
            NSRunLoop.mainRunLoop().addTimer(timer1!, forMode:NSDefaultRunLoopMode)
