from machine import Pin
from time import sleep_ms

vPVermelho = Pin(23, Pin.OUT, value=0)
vPAmarelo = Pin(22, Pin.OUT, value=0)
vPVerde = Pin(21, Pin.OUT, value=0)

while True:
    # Pare
    vPVermelho.on()
    sleep_ms(5000)
    
    # Siga
    vPVermelho.off()
    vPVerde.on()
    sleep_ms(10000)
    
    # Atenção
    vPAmarelo.on()
    vPVerde.off()
    sleep_ms(3000)
    vPAmarelo.off()