import machine
import time
  
led = machine.Pin(0, machine.Pin.OUT)
button = machine.Pin(14, machine. Pin.IN, machine.Pin.PULL_UP)
while True:
    if not button.value():
        led.on()
        print("LED ON!")
        time.sleep(0.5)
    else:
        led.off()
        print("LED OFF!")
        time.sleep(0.5)