docs: def happybirthday(person):
      """
      Sing Happy Birthday
      """
      print('Happy Birthday To You')
      time.sleep(2)
      print('Happy Birthday To You')
      time.sleep(2)
      print('Happy Birthday Dear ' + str(person[0].upper()) + str(person[1:]))
      time.sleep(2)
      print('Happy Birthday To You')