static Int64 lastFrameID = 0;
        static int handID = -1;
        static float storedSphereRadius = -1;

        static float timer = 1;         //Initialize a 2 second timer
        static float TIMER = 1;

        static float comparisonValue = 0.65f;

        enum CustomGestures { None, Closing, Opening } ;

        static void processFrameTest(Frame frame, GameTime gameTime)
        {
            if (frame.Id == lastFrameID || frame.Hands.Count <= 0) return;

            Hand hand;
            bool knownHand = false;
            CustomGestures detectedGesture = CustomGestures.None;

            float elapsed = (float)gameTime.ElapsedGameTime.TotalSeconds;
            timer -= elapsed;

            //if timer expired
            if (timer < 0)
            {
                //Reset Timer and stored values in order to retrieve new ones
                handID = -1;
                storedSphereRadius = -1;
                timer = TIMER;
            }

            // get hand
            if (handID == -1)
                hand = frame.Hands[0];
            else
            {
                knownHand = true;
                hand = frame.Hand(handID);
            }

            // is hand invalid?
            if (!hand.IsValid)
            {
                handID = -1;
                storedSphereRadius = -1;
                timer = -1;
                return;
            }
            else
            {
                handID = hand.Id;
            }

            // if it's the same hand, then we have a sphereRadius value
            // from which we can do a comparison
            if (knownHand && timer >= 0 && timer < TIMER)
            {
                //Console.WriteLine(sphereRadius.ToString() + "::::" + hand.SphereRadius.ToString());

                // if actual hand's sphere radius is around 65% from stored one,
                // then we can assume the that the hand is closed
                if (hand.SphereRadius < storedSphereRadius * comparisonValue)
                {
                    detectedGesture = CustomGestures.Closing;

                    Console.WriteLine("Closing");

                }
                else if (hand.SphereRadius * comparisonValue > storedSphereRadius)
                {
                    detectedGesture = CustomGestures.Opening;

                    Console.WriteLine("Opening");
                }
            }
            // in this case, it means we have a new Hand object,
            // hence the need to restore sphereRadius value
            else if (!knownHand)
            {
                storedSphereRadius = hand.SphereRadius;
            }

            // reset since we detected either a closing or an opening gesture
            if (detectedGesture != CustomGestures.None)
            {
                handID = -1;
                storedSphereRadius = -1;
                timer = -1;
            }

            lastFrameID = frame.Id;
        }