import digitalio
import board
import time
patas = [board.A0, board.A1, board.A2, board.A3]
ledA0 = digitalio.DigitalInOut(patas[0])
ledA1 = digitalio.DigitalInOut(patas[1])
ledA2 = digitalio.DigitalInOut(patas[2])
ledA3 = digitalio.DigitalInOut(patas[3])
ledA0.direction = digitalio.Direction.OUTPUT
ledA1.direction = digitalio.Direction.OUTPUT
ledA2.direction = digitalio.Direction.OUTPUT
ledA3.direction = digitalio.Direction.OUTPUT
ledA0.value = False
ledA1.value = False
ledA2.value = False
ledA3.value = False
while True:
    ledA0.value = True
    ledA3.value = False
    time.sleep(0.5)
    ledA1.value = True
    ledA0.value = False
    time.sleep(0.5)
    ledA2.value = True
    ledA1.value = False
    time.sleep(0.5)
    ledA3.value = True
    ledA2.value = False
    time.sleep(0.5)