from machine import Pin
from utime import sleep

led1=Pin(16,Pin.OUT)
led2=Pin(17,Pin.OUT)
led3=Pin(18,Pin.OUT)

while True:
    led1.on()
    led2.on()
    led3.on()
    sleep(1)    #PARAR
    led1.off()
    led2.off()
    led3.off()
    sleep(1)    #PARAR