def _setup_gpio(self):
        """
        Setup the GPIO pins used in the Chef HAT (input buttons and status LED)
        and create an event on the back button to terminate the process.
        """

        GPIO.setup(self.LED, GPIO.OUT)
        self.turn_led_off()

        for button in self.BUTTONS:
            GPIO.setup(button, GPIO.IN, self.PULL)
            self.remove_button_event(button)

        self.add_button_event(self.BUTTON_BACK, self.terminate)