input: Write a python function to display the current time in a specific format.
  assert display_time().startswith('It is currently ')
  assert len(display_time()) > len('It is currently ')
  assert ':' in display_time()
output: def display_time():
      from datetime import datetime
      current_time = datetime.now().strftime("%H:%M:%S")
      return f"It is currently {current_time}"