from machine import Pin
from utime import sleep, sleep_ms
led_rojo = Pin(26, Pin.OUT)
led_amarillo = Pin(25, Pin.OUT)
sensor = Pin(4, Pin.IN)
while True:
dato = sensor.value()
print(dato)
sleep_ms(50)
if dato == 1:
led_rojo.on()
led_amarillo.off()
else:
led_rojo.off()
led_amarillo.on()