#4.1.1.3. 예제

from microbit import *

brightness = 0

def set_led_brightness(pin, brightness):

    pin.write_analog(brightness)

while True:

    if button_a.is_pressed():

        brightness = min(brightness + 10, 1023)

        set_led_brightness(pin0, brightness)

        sleep(100)

    elif button_b.is_pressed():

        brightness = max(brightness - 10, 0)

        set_led_brightness(pin0, brightness)

        sleep(100)