input: Write a python function to order a pizza with given toppings.
  assert orderPizza(["Pepperoni", "Mushroom", "Olives"])== "Ordering a pizza with the following toppings:\nPepperoni\nMushroom\nOlives\nThank you!"
  assert orderPizza(["Cheese", "Tomato"])== "Ordering a pizza with the following toppings:\nCheese\nTomato\nThank you!"
  assert orderPizza([])== "Ordering a pizza with the following toppings:\nThank you!"
output: def orderPizza(toppings):
      order_message = "Ordering a pizza with the following toppings:\n"
      for topping in toppings:
          order_message += topping + "\n"
      order_message += "Thank you!"
      return order_message