diff --git a/bank.py b/bank.py
new file mode 100644
index 0000000..e21bf1b
--- /dev/null
+++ b/bank.py
@@ -0,0 +1,21 @@
+class Bank:
+
+    clients = []
+
+    def __init__(self, name):
+        self.name = name
+
+    def add_client(self, client):
+        self.clients.append(client)
+
+    def authentication(self, name, account_number):
+        for i in range(len(self.clients)):
+            if name == self.clients[i].name and account_number == self.clients[i].account_number:
+                print("Authentication successful!")
+                return self.clients[i]
+
+        print('''
+    Authentication failed!
+    Reason: account not found.
+    ''')
+    
\ No newline at end of file
diff --git a/bank1.2.png b/bank1.2.png
new file mode 100644
index 0000000..058faab
Binary files /dev/null and b/bank1.2.png differ
diff --git a/client.py b/client.py
new file mode 100644
index 0000000..3020aa3
--- /dev/null
+++ b/client.py
@@ -0,0 +1,35 @@
+from random import randint
+
+class Client:
+
+    available_nums = []
+
+    def __init__(self, name, total_amount):
+        self.name = name
+        self.total_amount = total_amount
+        self.account_number = self.generate_random()
+        self.available_nums.append(self.account_number)
+
+    def generate_random(self):
+        num = randint(10000, 99999)
+        while num in self.available_nums:
+            num = randint(10000, 99999)
+        return num
+
+    def withdraw(self, amount):
+        if self.total_amount >= amount:
+            self.total_amount -= amount
+            print(f"The sum of {amount} has been withdrawn from your account balance.")
+            self.balance()
+        else:
+            print("Not enough money!")
+
+    def deposit(self, amount):
+        self.total_amount += amount
+        print(f"The sum of {amount} has been added to your account balance.")
+        self.balance()
+
+    def balance(self):
+        print(f"Your current account balance is: {self.total_amount}")
+        return self.total_amount
+
diff --git a/main.py b/main.py
new file mode 100644
index 0000000..33629f4
--- /dev/null
+++ b/main.py
@@ -0,0 +1,62 @@
+from bank import Bank
+from client import Client
+
+bank = Bank("ING")
+
+print(f"Welcome to {bank.name}!")
+
+available = True
+
+while available:
+    print('''
+Choose an option:
+
+    1. Open new bank account
+    2. Open existing bank account
+    3. Exit
+
+    ''')
+    user_input = int(input())
+    if user_input == 1:
+        print("To create an account, please fill in the information below.")
+        name = input("Name:")
+        amount = int(input("Deposit amount:"))
+        client = Client(name, amount)
+        bank.add_client(client)
+        print(f"Account created successfully! Your account number is: {client.account_number}")
+    elif user_input == 2:
+        print("To access your account, please enter your credentials below.")
+        name = input("Name:")
+        account_no = int(input("Account Number:"))
+        curr_client = bank.authentication(name, account_no)
+        if curr_client:
+            authorized = True
+            while authorized:
+                print(f'''
+                Welcome {curr_client.name}!
+
+                Choose an option:
+
+                    1. Withdraw
+                    2. Deposit
+                    3. Balance
+                    4. Exit
+                ''')
+                curr_input = int(input("1, 2, 3, or 4:"))
+                if curr_input == 1:
+                    w_amount = int(input("Withdraw amount:"))
+                    curr_client.withdraw(w_amount)
+                elif curr_input == 2:
+                    d_amount = int(input("Deposit amount:"))
+                    curr_client.deposit(d_amount)
+                elif curr_input == 3:
+                    curr_client.balance()
+                elif curr_input == 4:
+                    authorized = False
+                else:
+                    print("Invalid input, please enter 1, 2, 3, or 4!")
+    elif user_input == 3:
+        available = False
+    else:
+        print('Input should be 1, 2, or 3!')
+    
\ No newline at end of file