import sys
import logging
import asyncio
import signal
from time import*

logger = logging.getLogger(__name__)

logging.basicConfig(level=logging.INFO)

async def f():
    if 1:
        main_task = asyncio.current_task()
        def on_sigint() -> None:
            logger.error("Received SIGINT")
            main_task.cancel(KeyboardInterrupt)
        asyncio.get_running_loop().add_signal_handler(signal.SIGINT, on_sigint)
    try:
        while True:
            await asyncio.sleep(0.1)
            print("*")
    except asyncio.CancelledError as e:
        print(e)
        try:
            while True:
                await asyncio.sleep(0.1)
                print("#")
        except asyncio.CancelledError:
            try:
                while True:
                    await asyncio.sleep(0.1)
                    print("!")
            except asyncio.CancelledError:
                while True:
                    await asyncio.sleep(0.1)
                    print("@")

asyncio.run(f())