from machine import Pin
boton_pull_down = Pin(25, Pin.IN, Pin.PULL_DOWN)
led = Pin(2. Pin.OUT)
while True:
if boton_pull_down.value() == 1:
    print("LED encenddido para pull-down")
    led.value(1)
else:
    led.value(0)
    print("LED apagado para pull-down")