from machine import Pin
from utime import sleep

led_rojo=Pin(21,Pin.OUT)
led_verde=Pin(4,Pin.OUT)

while True:
    print("rojo")
    led_rojo.value(1)
    sleep(3)
    led_rojo.value(0)
    sleep(2)
    print("verde")
    led_verde.value(1)
    sleep(3)
    led_verde.value(0)
    sleep(2)