text: #!/usr/bin/env python
  # -*- coding: utf-8 -*-
  
  import sys
  import time
  
  if __name__ == '__main__':
  
      delay = 1
      if len(sys.argv) > 1:
          delay = float(sys.argv[1])
      for i in range(5):
          print(i, flush=True)
          time.sleep(delay)
      print('quit', flush=True)
  