import machine
import time 

LED_PIN = 0
BUTTON_PIN = 9

led = machine.Pin(LED_PIN,machine.Pin.OUT)
button = machine.Pin(BUTTON_PIN,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)