diff --git a/Pizzeria_oop b/Pizzeria_oop
new file mode 100644
index 0000000..f43c13e
--- /dev/null
+++ b/Pizzeria_oop
@@ -0,0 +1,94 @@
+class Pizza:
+
+    SMALL = 25
+    MEDIUM = 30
+    LARGE = 40
+    PEPPERONI = "Pepperoni type"
+    MARGARITA = "Margarita type"
+    COOKING = 0
+    READY = 1
+
+    def __init__(self, ingredients, size):
+        self.ingredients = ingredients
+        self.size = size
+        self.ready = Pizza.COOKING
+
+    def cook(self):
+        print('Pizza is being cooked...')
+        self.ready = Pizza.READY
+        print('Pizza is ready!')
+
+
+class Pepperoni(Pizza):
+
+    pepperoni_ings = ['Salami', 'Cheese']
+
+    def __init__(self, size):
+        super().__init__(Pepperoni.pepperoni_ings, size)
+
+
+class Margarita(Pizza):
+
+    margarita_ings = ['Tomato', 'Cheese']
+
+    def __init__(self, size):
+        super().__init__(Margarita.margarita_ings, size)
+
+
+class Worker:
+
+    def __init__(self):
+        self.order = None
+        self.__cash = 0
+
+    @staticmethod
+    def greet_client(name):
+        print(f"Welcome, {name}!")
+
+    def get_order(self, pizza_type, pizza_size):
+        if pizza_type == Pizza.PEPPERONI:
+            self.order = Pepperoni(pizza_size)
+        elif pizza_type == Pizza.MARGARITA:
+            self. order = Margarita(pizza_size)
+
+    def get_money(self, money):
+        self.__cash += money
+
+    def process_order(self):
+        self.order.cook()
+        return self.order
+
+
+class Client:
+    default_name = 'Alex'
+
+    def __init__(self, money, name=default_name):
+        self.__money = money
+        self.name = name
+        self.pizza = None
+
+    @staticmethod
+    def choose_margarita_pizza():
+        return Pizza.MARGARITA
+
+    @staticmethod
+    def choose_pepperoni_pizza():
+        return Pizza.PEPPERONI
+
+    @staticmethod
+    def choose_small_size():
+        return Pizza.SMALL
+
+    @staticmethod
+    def choose_medium_size():
+        return Pizza.MEDIUM
+
+    @staticmethod
+    def choose_large_size():
+        return Pizza.LARGE
+
+    def pay_money(self, money):
+        self.__money -= money
+
+    def get_pizza(self, pizza):
+        self.pizza = pizza