from machine import Pin
from time import sleep

l1 = Pin(12, Pin.OUT)
l3 = Pin(13, Pin.OUT)
l2 = Pin(14, Pin.OUT)

b1 = Pin(5, Pin.IN, Pin.PULL.UP)
b2 = Pin(19, Pin.IN, Pin.PULL.UP)
b3 = Pin(4, Pin.IN, Pin.PULL.UP)

while True:
    l1.value(not b1.value())
    l2.value(not b2.value())
    l3.value(not b3.value())
if b1.value() == 0:
    l1.on()
    print(1)
    sleep(0.15)

if b2.value() == 0:
    l2.on()
    print(2)
    sleep(0.15)
    
if b3.value() == 0:
    l3.on()
    print(3)
    sleep(0.15)