My append function doesn't seem to work for the shopping list application. When I click "show" my list is empty.

shopping_list = []

def show_help():
    print("What should we pick up at the store?")
    print ("""
    Enter 'DONE' to stop adding items.
    Enter 'HELP for this help.
    Enter 'SHOW' to see your current lsit.
    """)


def add_to_list(item):
    shopping_list.append(item)
    print("Added! List has {} items.".format(len(shopping_list)))


def show_list():
  print("Here's your list:")
  for item in shopping_list:
    print(item)   

show_help()
while True:
    new_item = input("> ")

    if new_item == 'DONE':
        break
    elif new_item == 'HELP':
        show_help()
        continue
    elif new_item == 'SHOW':
      show_list()
      continue

      add_to_list(new_item)

show_list()