import digitalio
import board
import time
led = digitalio.DigitalInOut(board.D13)
led.direction = digitalio.Direction.OUTPUT
t_enc = 0.5  # El LED está 0,5 s encendido
t_ap = 0.5  # El LED está 0,5 s apagado
t_fin = 2  # El LED está 2 s apagado al final
while True:
    led.value = True
    time.sleep(t_enc)
    led.value = False
    time.sleep(t_ap)
    led.value = True
    time.sleep(t_enc)
    led.value = False
    time.sleep(t_ap)
    led.value = True
    time.sleep(t_enc)
    led.value = False
    time.sleep(t_fin)