from machine import Pin
from utime import sleep, sleep_ms, sleep_us

led_R = Pin(15, Pin.OUT)
led_A = Pin(2, Pin.OUT)
led_V = Pin(0, Pin.OUT)

tiempo=800

while True:
    led_R.on()
    led_A.off()
    led_V.off()
    sleep_ms(tiempo)
    led_R.off()
    led_A.on()
    led_V.off()
    sleep_ms(tiempo)
    led_R.off()
    led_A.off()
    led_V.on()
    sleep_ms(tiempo)
    led_R.off()
    led_A.on()
    led_V.off()
    sleep_ms(tiempo)