from machine import Pin
import time

LED_PIN = 2
BTN_PIN = 14
led = Pin( LED_PIN , Pin.OUT)
btn = Pin(BTN_PIN , Pin.IN ,Pin.PULL_UP)
led.value(1)

while True:
    if btn.value() == 0 :
        led.value(1)
    else:
        led.value(0)
        time.sleep(0.02)