import time

from machine import Pin

global __PIN__


def set_pin(pin):
    global __PIN__
    __PIN__ = Pin(pin, Pin.OUT)


def led(on):
    pin = __PIN__
    if on:
        pin.on()
    else:
        pin.off()


def blinker():
    pin = __PIN__
    while True:
        pin.on()
        time.sleep(1)
        pin.off()
        time.sleep(1)