diff --git a/__init__.py b/__init__.py
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diff --git a/__pycache__/client.cpython-39.pyc b/__pycache__/client.cpython-39.pyc
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diff --git a/bank.py b/bank.py
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+++ b/bank.py
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+'''**bank.py**
+
+- 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
+'''
+
+
+from client import Client
+
+
+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]
+            else:
+                print("Authentication not successful!")
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diff --git a/client.py b/client.py
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--- /dev/null
+++ b/client.py
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+'''**client.py**
+- 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
+
+rnd_list=list(set(random.randint(10000,99999) for i in range(9999)))
+
+class Client:
+    i=0
+    def __init__(self, name, total_amount):
+
+        self.name=name
+        self.total_amount=total_amount
+        self.account_number=rnd_list[Client.i]
+        self.account={'name':self.name,'total_amount':self.total_amount,"account_number":self.account_number}
+        Client.i+=1
+
+    def withdraw(self,amount):
+        amount=float(input("Enter withdraw amount :"))
+        if self.total_amount >= amount:
+            self.account -=amount
+            print(f"The sum of {amount} has been withdrawn from your account balance.")
+            print(f"Current account balance is : {self.total_amount}")
+        
+        else:
+            print("Current account balance is not enough.")
+            return self.account
+        
+
+    def deposit(self,amount):
+
+        amount=float(input("Enter deposit amount :"))
+        self.total_amount+=amount
+        print(f"The sum of {amount} has been added to your account balance.")
+        print(f"Current account balance is : {self.total_amount}")
+        return self.total_amount
+        
+    
+    def balance(self):
+        print(f"Current account balance is : {self.total_amount}")
+
+
+
+
+client1=Client
+print(client1)
+
+
diff --git a/main.py b/main.py
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index 0000000..97eb7a5
--- /dev/null
+++ b/main.py
@@ -0,0 +1,51 @@
+
+from client import Client
+from bank import Bank
+
+
+class main(Bank):
+    bank_name=Bank(input("Name of Bank : "))
+    print(f"Welcome to {bank_name}")
+
+    while True:
+
+        print("""Choose an option:
+        1. Open new bank account
+        2. Open existing bank account
+        3. Exit
+        """)
+        demands=int(input("Please Enter you want to transaction : "))
+
+        if demands==1:
+            name=input("Name :")
+            new_amount=int(input("Your amount :"))
+            customer1=Client(name,new_amount)
+            bank_name.add_client(customer1.account)
+            print(f"Account created successfully.Your account number is {customer1.account['account_number']}")
+
+        elif demands==2:
+            name=input("Name :")
+            account_number=int(input("Enter your account number :"))
+            ##clint_credentials=bank_name.authentication(name,account_number)
+
+            while True:
+                print("""Choose an transaction
+            1. Withdraw,
+            2. Deposit
+            3. Balance
+            4. Exit""")
+
+                transaction=int(input("Please choice transsaction :"))
+
+                if transaction==1:
+                    Client.deposit()
+            
+                elif transaction == 2:
+                    Client.withdraw(1)
+                elif transaction == 3:
+                    Client.balance()
+                else:
+                    break
+        else :
+            print("Have a Nice Day!")
+            break 
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