from machine import Pin
import time
led_pin = Pin(21, Pin.OUT)  
switch_pin = Pin(14, Pin.IN)  

while True:

    switch_state = switch_pin.value()
    if switch_state == 0:
        led_pin.on()
        print("LED ON")
    else:
        led_pin.off()
        print("LED OFF")
    time.sleep(0.5)