from machine import Pin
from time import sleep_ms

q1 = Pin(5, Pin.OUT, value=1)
q2 = Pin(2, Pin.OUT, value=0)
sleep_ms(1000) # Apenas para ver o estado inicial com calma. Não precisa

while True:
    q1.on()
    q2.off()
    sleep_ms(450)
    q1.off()
    q2.on()
    sleep_ms(450)