from machine import Pin
from time import sleep

led = Pin(2, Pin.OUT)

def callback(p):
    print('pin change', p, p.value())
    sleep(0.1)
    
button1 = Pin(13, Pin.IN)
button1.irq(trigger=Pin.IRQ_FALLING, handler=callback)

button2 = Pin(14, Pin.IN)
button2.irq(trigger=Pin.IRQ_FALLING, handler=callback)

while True:
    pass