from machine import Pin, Timer 
from time import sleep_ms

led = Pin(2, Pin.OUT)
button_pin = Pin(4, Pin.IN, Pin.PULL_UP)
push_button_timer = Timer(1)

def push_button_pressed(event):
    if button_pin.value() == False:
        led.value(not led.value())
    # else:
    #     led.off()

push_button_timer.init(period=50, mode = Timer.PERIODIC, callback=push_button_pressed)