import machine
import utime

# Configuración de pines
led1 = machine.Pin(26, machine.Pin.OUT)
led2 = machine.Pin(18, machine.Pin.OUT)
led3 = machine.Pin(16, machine.Pin.OUT)

# Ciclo infinito
while True:

    # ida
    led1.value(1); led2.value(0); led3.value(0)
    utime.sleep(0.3)

    led1.value(0); led2.value(1); led3.value(0)
    utime.sleep(0.3)

    led1.value(0); led2.value(0); led3.value(1)
    utime.sleep(0.3)

    # regreso
    led1.value(0); led2.value(1); led3.value(0)
    utime.sleep(0.3)