input: 
  def design_positive_feedback_loop(threshold: int) -> None:
      """Designs a positive feedback loop for a python program. The program prints "hello" a specified number of times and then provides positive feedback.
      >>> design_positive_feedback_loop(10)
      ""
      """
  
output:     for i in range(threshold):
          print("hello")
      print("Great job! You've printed 'hello' {} times.".format(threshold))