text: import threading
  
  
  def big_countdown(n):
      while n:
          n -= 1
  
  
  if __name__ == '__main__':
      thread1 = threading.Thread(target=big_countdown, args=(100_000_000,))
      thread2 = threading.Thread(target=big_countdown, args=(100_000_000,))
  
      thread1.start()
      thread2.start()
  
      thread1.join()
      thread2.join()
  