Message Component - Reset?

def user_hal_pins():
    comp.newpin('notifications', hal.HAL_BIT, hal.HAL_OUT)
    comp.ready()

def user_live_update():
    if len(notifications.widgets):
        comp ["notifications"] = True
    else:
        comp ["notifications"] = False

def user_hal_pins():
    comp.newpin('turn-off-machine', hal.HAL_BIT, hal.HAL_IN)
    comp.newpin('turn-off-machine.is-on', hal.HAL_BIT, hal.HAL_OUT)
    comp.ready()

def user_live_update():	
  if bool(comp["turn-off-machine"]):
        comp ["turn-off-machine.is-on"] = False
    else:
        os.system('systemctl poweroff')

time.sleep(5)
os.system('notify-send -t 10 -u low "turning off..."')
tkMessageBox.showinfo("turning off...", "power off")

sdShow = False
sdCount = 0
sdSecs = '543210'

def user_hal_pins():
    comp.newpin('turn-off-machine', hal.HAL_BIT, hal.HAL_IN)
    comp.ready()

def user_live_update():
    global sdShow, sdCount, sdStart, sdLabel, sdWindow
    if comp['turn-off-machine'] and s.interp_state == linuxcnc.INTERP_IDLE:
        if not sdShow:
            sdStart = time.time()
            sdWindow = Tkinter.Toplevel(relief='ridge', borderwidth=4)
            sdWindow.title('SHUTDOWN')
            sdLabel = Tkinter.Label(sdWindow, fg='red', font='sans 16 bold')
            sdLabel.pack()
            sdShow = True
        else:
            if sdCount > 5:
                sdWindow.destroy()
                os.system('systemctl poweroff')
            elif time.time() > sdStart + sdCount:
                msg = 'Turning machine off in {} seconds'.format(sdSecs[sdCount])
                sdLabel.config(text=msg)
                sdCount += 1
    elif sdShow:
        sdWindow.destroy()
        sdShow = False
        sdCount = 0