async def print_counter() -> None:
    """
    Coroutine that prints counters and saves it in a global variable.
    """
    while True:
        print(f"Counter: {counter[0]}")
        counter[0] += 1
        await asyncio.sleep(3)

    Coroutine that prints counters and saves it in a global variable.
    
examples/asyncio-python-embed.py