static void Order2()
{
IPizza pizza = new CheseLover();
AExtraServings servings = new ExtraSauce(pizza);
Console.WriteLine("Order Title: " + servings.Description());
Console.WriteLine("Bill: " + servings.Bill() + "\n\n\n");
}
static void Order4()
{
IPizza pizza = new FourSeason();
pizza = new ExtraTopping(pizza);
pizza = new ExtraSauce(pizza);
Console.WriteLine("Order Title: " + pizza.Description());
Console.WriteLine("Bill: " + pizza.Bill() + "\n\n\n");
}