from machine import Pin
import time

led = Pin(18, Pin.OUT)
pul = Pin(17, Pin.IN, Pin.PULL_UP)

while True:
    if pul.value() == 0:
        time.sleep(0.05)
        if pul.value() == 0:
            led.value(not led.value())
            while pul.value() == 0:
                time.sleep(0.01)        
            
        
    time.sleep(0.01)