a timer on renpy that checks time over the internet

init python:
    import requests
    import datetime

    # get current datetime from site
    def get_worldtime():
        res = None
        try:
            # get data from worldtimeapi.org
            data = requests.get('http://worldtimeapi.org/api/timezone/Etc/UTC').json()["datetime"]
            # convert string to datetime format
            res = datetime.datetime.fromisoformat(data)
        except requests.RequestException as e:
            renpy.notify("Something wrong: " + str(e))
        return res

    # using sample
    def check_time():
        world_now = get_worldtime().timestamp()
        now = datetime.datetime.now().timestamp()
        # do what you want
        # ***
        dt = now - world_now
        renpy.notify(str(dt))

label start:
    # test
    # $ check_time()
    # $ t = get_worldtime()
    # "[t]"

    python:
        now = datetime.datetime.now().timestamp()
        world_now = get_worldtime().timestamp()
        dt = now - world_now
    $ xxx = str(dt)
    "No pause: [xxx]"

    python:
        now = datetime.datetime.now().timestamp()
        renpy.pause(2)
        world_now = get_worldtime().timestamp()
        dt = now - world_now
    $ xxx = str(dt)
    "With pause: [xxx]"

    return