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diff --git a/Bank_Project/__pycache__/client.cpython-39.pyc b/Bank_Project/__pycache__/client.cpython-39.pyc
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diff --git a/Bank_Project/bank.py b/Bank_Project/bank.py
new file mode 100644
index 0000000..9c33ad9
--- /dev/null
+++ b/Bank_Project/bank.py
@@ -0,0 +1,29 @@
+#* - You will have class `Bank`. This bank will have instance variable `name` 
+#* and class variable `clients` list. Initially this list will be empty.
+#* - This class will have method `add_client` method which appends the client to list
+#* - And lastly this class will have `authentication` method which takes 
+#* `name` and `account_number` as parameters and authenticates the client
+
+
+
+class Bank:
+    clients = [[11111,'aaa',1000], [22222,'bbb',2000], [33333,'ccc',3000]]
+    def __init__(self,name):
+        self.name = name
+    
+    def add_client(self,account_number,name,total_amount):
+        self.name = name
+        self.total_amount = total_amount
+        self.account_number = account_number
+        Bank.clients.append([self.account_number,self.name,self.total_amount])
+
+
+    def authentication(self,name,account_number):
+        self.name = name
+        self.account_number = account_number
+        # for i in range(len(self.clients)):
+        #     if (self.account_number == self.clients[i][0] and self.name == self.clients[i][1]):
+        #         return True
+        for i in self.clients:
+            if i[0] == self.account_number and i[1] == self.name:
+                return True
diff --git a/Bank_Project/client.py b/Bank_Project/client.py
new file mode 100644
index 0000000..ed5d032
--- /dev/null
+++ b/Bank_Project/client.py
@@ -0,0 +1,51 @@
+# - You will have class `Client` inside this file.
+# - Class `Client` will have `account_number`, `name`, `total_amount` attributes
+# - `__init__` method will initialize these variables, it will take `name` and
+#  `total_amount` as params and will assign a random 5 digit int to `account_number`
+# - Lastly this class will have `withdraw`, `deposit` and `balance` methods.
+
+import random
+import string
+from bank import Bank
+
+
+class Client:
+
+    def __init__(self,name,total_amount):
+        self.name = name
+        self.total_amount = total_amount
+        self.account_number = random.randint(10000,99999)
+        
+        b1 = Bank(self.name)
+        b1.add_client(self.account_number,self.name,self.total_amount)
+        print(f'Account created successfully! Your account number is: {self.account_number}')
+    
+
+
+    def withdraw(self,account_number,amount):
+        self.account_number = account_number
+        self.amount = amount
+        for i in range(len(Bank.clients)):
+            if self.account_number==Bank.clients[i][0]:
+                Bank.clients[i][2] -= self.amount
+                self.total_amount = Bank.clients[i][2]
+                print(f'The sum of {self.amount} has been withdrawn from your account balance.')
+                print(f'Your current account balance is: {self.total_amount}')
+    
+    def deposit(self,account_number,amount):
+        self.account_number = account_number
+        self.amount = amount
+        for i in range(len(Bank.clients)):
+            if self.account_number==Bank.clients[i][0]:
+                Bank.clients[i][2] += self.amount
+                self.total_amount = Bank.clients[i][2]
+                print(f'The sum of {self.amount} has been added to your account balance.')
+                print(f'Your current account balance is: {self.total_amount}')
+
+    def balance(self,account_number):
+        self.account_number = account_number
+        for i in range(len(Bank.clients)):
+            if self.account_number==Bank.clients[i][0]:
+                self.total_amount = Bank.clients[i][2]
+                print(f'Your current account balance is: {Bank.clients[i][2]}')
+
diff --git a/Bank_Project/main.py b/Bank_Project/main.py
new file mode 100644
index 0000000..3bbb30d
--- /dev/null
+++ b/Bank_Project/main.py
@@ -0,0 +1,78 @@
+# This class initially will create a bank object with a name you choose and
+# then will print the following menu (it should print this menu, until user says exit) 
+
+
+from bank import Bank
+from client import Client
+import time
+
+while True:
+    print('''
+    Welcome to International Bank!
+
+Choose an option:
+
+    1. Open new bank account
+    2. Open existing bank account
+    3. Exit
+    ''')
+    kies_1 = int(input('your choise : '))
+    if kies_1 == 1:
+        print('''
+        To create an account, please fill in the information below.
+        ''')
+        a = str(input('Name: '))
+        b = int(input('Deposit amount: '))
+        Client(a,b)
+        
+
+    elif kies_1 == 2:
+        print('''
+        To access your account, please enter your credentials below.
+        ''')
+        while True:
+            name = input('Name: ')
+            account_number =int(input('Account Number: '))
+            authen = Bank.authentication(Bank,name,account_number)
+            if authen == True:
+                print('Authentication successful!')
+                break
+            else:
+                print('Authentication failed!\nReason: account not found.')
+                
+
+                continue
+                
+        while True:
+            print(f'''
+            Welcome {name}!
+
+            Choose an option:
+
+                1. Withdraw
+                2. Deposit
+                3. Balance
+                4. Exit
+            ''')
+            kies_2 = int(input('your choise : '))
+            if kies_2 == 1:
+                amount = int(input('Withdraw amount: '))
+                Client.withdraw(Client,account_number,amount)
+                time.sleep(2)
+                
+            elif kies_2 ==2:
+                deposit = int(input('Deposit amount: '))
+                Client.deposit(Client,account_number,deposit)
+                time.sleep(2)
+                
+            elif kies_2 == 3:
+                Client.balance(Client,account_number)
+                time.sleep(2)
+
+            elif kies_2 == 4:
+                break
+
+                
+        
+    elif kies_1 == 3:
+        break