Motion sensing with FEZ Domino

#region motion sensor
            Thread.Sleep(30000);

            tone = new FEZ_Components.Piezo(FEZ_Pin.PWM.Di5);
            InterruptPort motion = new InterruptPort((Cpu.Pin)FEZ_Pin.Interrupt.Di1, false, Port.ResistorMode.Disabled, Port.InterruptMode.InterruptEdgeHigh);
            motion.OnInterrupt += new NativeEventHandler(motion_OnInterrupt);

            Thread.Sleep(-1);
#endregion

static void motion_OnInterrupt(uint data1, uint data2, DateTime time)
        {
            tone.Play(400, 1000);
        }