diff --git a/crud_operation/.gitignore b/crud_operation/.gitignore
new file mode 100644
index 00000000..f3eb67e6
--- /dev/null
+++ b/crud_operation/.gitignore
@@ -0,0 +1,209 @@
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[codz]
+*$py.class
+
+test
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+share/python-wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+
+# PyInstaller
+#  Usually these files are written by a python script from a template
+#  before PyInstaller builds the exe, so as to inject date/other infos into it.
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.nox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*.cover
+*.py.cover
+.hypothesis/
+.pytest_cache/
+cover/
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
+*.log
+local_settings.py
+db.sqlite3
+db.sqlite3-journal
+
+# Flask stuff:
+instance/
+.webassets-cache
+
+# Scrapy stuff:
+.scrapy
+
+# Sphinx documentation
+docs/_build/
+
+# PyBuilder
+.pybuilder/
+target/
+
+# Jupyter Notebook
+.ipynb_checkpoints
+
+# IPython
+profile_default/
+ipython_config.py
+
+# pyenv
+#   For a library or package, you might want to ignore these files since the code is
+#   intended to run in multiple environments; otherwise, check them in:
+# .python-version
+
+# pipenv
+#   According to pypa/pipenv#598, it is recommended to include Pipfile.lock in version control.
+#   However, in case of collaboration, if having platform-specific dependencies or dependencies
+#   having no cross-platform support, pipenv may install dependencies that don't work, or not
+#   install all needed dependencies.
+#Pipfile.lock
+
+# UV
+#   Similar to Pipfile.lock, it is generally recommended to include uv.lock in version control.
+#   This is especially recommended for binary packages to ensure reproducibility, and is more
+#   commonly ignored for libraries.
+#uv.lock
+
+# poetry
+#   Similar to Pipfile.lock, it is generally recommended to include poetry.lock in version control.
+#   This is especially recommended for binary packages to ensure reproducibility, and is more
+#   commonly ignored for libraries.
+#   https://python-poetry.org/docs/basic-usage/#commit-your-poetrylock-file-to-version-control
+#poetry.lock
+#poetry.toml
+
+# pdm
+#   Similar to Pipfile.lock, it is generally recommended to include pdm.lock in version control.
+#   pdm recommends including project-wide configuration in pdm.toml, but excluding .pdm-python.
+#   https://pdm-project.org/en/latest/usage/project/#working-with-version-control
+#pdm.lock
+#pdm.toml
+.pdm-python
+.pdm-build/
+
+# pixi
+#   Similar to Pipfile.lock, it is generally recommended to include pixi.lock in version control.
+#pixi.lock
+#   Pixi creates a virtual environment in the .pixi directory, just like venv module creates one
+#   in the .venv directory. It is recommended not to include this directory in version control.
+.pixi
+
+# PEP 582; used by e.g. github.com/David-OConnor/pyflow and github.com/pdm-project/pdm
+__pypackages__/
+
+# Celery stuff
+celerybeat-schedule
+celerybeat.pid
+
+# SageMath parsed files
+*.sage.py
+
+# Environments
+.env
+.envrc
+.venv
+env/
+venv/
+ENV/
+env.bak/
+venv.bak/
+
+# Spyder project settings
+.spyderproject
+.spyproject
+
+# Rope project settings
+.ropeproject
+
+# mkdocs documentation
+/site
+
+# mypy
+.mypy_cache/
+.dmypy.json
+dmypy.json
+
+# Pyre type checker
+.pyre/
+
+# pytype static type analyzer
+.pytype/
+
+# Cython debug symbols
+cython_debug/
+
+# PyCharm
+#  JetBrains specific template is maintained in a separate JetBrains.gitignore that can
+#  be found at https://github.com/github/gitignore/blob/main/Global/JetBrains.gitignore
+#  and can be added to the global gitignore or merged into this file.  For a more nuclear
+#  option (not recommended) you can uncomment the following to ignore the entire idea folder.
+#.idea/
+
+# Abstra
+# Abstra is an AI-powered process automation framework.
+# Ignore directories containing user credentials, local state, and settings.
+# Learn more at https://abstra.io/docs
+.abstra/
+
+# Visual Studio Code
+#  Visual Studio Code specific template is maintained in a separate VisualStudioCode.gitignore 
+#  that can be found at https://github.com/github/gitignore/blob/main/Global/VisualStudioCode.gitignore
+#  and can be added to the global gitignore or merged into this file. However, if you prefer, 
+#  you could uncomment the following to ignore the entire vscode folder
+# .vscode/
+
+# Ruff stuff:
+.ruff_cache/
+
+# PyPI configuration file
+.pypirc
+
+# Cursor
+#  Cursor is an AI-powered code editor. `.cursorignore` specifies files/directories to
+#  exclude from AI features like autocomplete and code analysis. Recommended for sensitive data
+#  refer to https://docs.cursor.com/context/ignore-files
+.cursorignore
+.cursorindexingignore
+
+# Marimo
+marimo/_static/
+marimo/_lsp/
+__marimo__/
diff --git a/crud_operation/LICENSE b/crud_operation/LICENSE
new file mode 100644
index 00000000..d4b020a0
--- /dev/null
+++ b/crud_operation/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2025 Luckson
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/crud_operation/README.md b/crud_operation/README.md
new file mode 100644
index 00000000..e4c35267
--- /dev/null
+++ b/crud_operation/README.md
@@ -0,0 +1,87 @@
+# User Management System (CLI)
+
+A lightweight **Command Line Interface (CLI)** application built with Python to manage user records using **CRUD** (Create, Read, Update, Delete) operations. This project features a dynamic typewriter effect with ANSI color support for enhanced user experience.
+
+---
+
+## 🚀 Features
+
+* **Full CRUD Operations:** View, Add, Update, and Delete users.
+* **Dynamic UI:** Includes a "typewriter" animation effect for console output.
+* **Color-Coded Feedback:**
+    * 🟢 **Green:** Success messages.
+    * 🔴 **Red:** Error messages and exit alerts.
+* **Input Validation:** Ensures only numeric inputs are processed for actions.
+* **Error Handling:** Robust `try-except` blocks to prevent crashes during runtime.
+
+---
+
+## 🛠️ Project Structure
+
+```text
+├── main.py              # Entry point of the application
+├── crud/
+│   └── views.py         # User model and view logic
+└── services/
+    └── action.py        # Logic mapping inputs to CRUD functions
+
+```
+
+---
+
+## 💻 Installation & Usage
+
+1. **Clone the repository:**
+```bash
+git clone [https://github.com/yourusername/user-management-python.git](https://github.com/yourusername/user-management-python.git)
+cd user-management-python
+
+```
+
+
+2. **Run the application:**
+```bash
+python main.py
+
+```
+
+## 📖 Menu Options
+
+Upon launching, select an option by typing the corresponding number:
+
+| Option | Action | Description |
+| --- | --- | --- |
+| **1** | **Show users list** | Displays all registered users. |
+| **2** | **Add user** | Opens a prompt to create a new user profile. |
+| **3** | **Update user** | Modifies existing user details. |
+| **4** | **Delete user** | Removes a user from the system. |
+| **5** | **Quit** | Safely closes the application. |
+
+---
+
+## ⚙️ Technical Highlights
+
+### Visual Effects
+
+The system uses the `sys.stdout` buffer to print characters one by one for a typewriter effect, combined with **ANSI escape codes** for coloring:
+
+* **Green (`\033[92m`)**: Used for successful operations.
+* **Red (`\033[91m`)**: Used for errors and exit messages.
+
+### Logic Flow
+
+The program verifies that the input is a digit before processing, preventing common input errors.
+
+```python
+if action.isdigit():
+    actions(action, User)
+else:
+    print("Enter the action number.")
+
+```
+
+---
+
+## 📝 License
+
+This project is open-source and available under the **MIT License**.
\ No newline at end of file
diff --git a/crud_operation/crud/__init__.py b/crud_operation/crud/__init__.py
new file mode 100644
index 00000000..e69de29b
diff --git a/crud_operation/crud/db.py b/crud_operation/crud/db.py
new file mode 100644
index 00000000..3f103c4b
--- /dev/null
+++ b/crud_operation/crud/db.py
@@ -0,0 +1,7 @@
+import sqlite3
+
+def db_connection():
+    con = sqlite3.connect("db/users.db")
+    cursor = con.cursor()
+
+    return con, cursor
diff --git a/crud_operation/crud/models.py b/crud_operation/crud/models.py
new file mode 100644
index 00000000..ab4ac0de
--- /dev/null
+++ b/crud_operation/crud/models.py
@@ -0,0 +1,20 @@
+from crud.db import db_connection
+
+class Model:
+    def user(self):
+        con, cursor = db_connection()
+
+        cursor.execute(
+            """
+                CREATE TABLE IF NOT EXISTS Users(
+                    id INTEGER PRIMARY KEY AUTOINCREMENT,
+                    first_name TEXT NOT NULL,
+                    last_name TEXT NOT NULL,
+                    age INTEGER NOT NULL,
+                    email TEXT NOT NULL,
+                    UNIQUE(email)
+                )
+            """
+        )
+
+        con.commit()
diff --git a/crud_operation/crud/test.py b/crud_operation/crud/test.py
new file mode 100644
index 00000000..7aff256f
--- /dev/null
+++ b/crud_operation/crud/test.py
@@ -0,0 +1,50 @@
+import sqlite3
+
+con = sqlite3.connect("users.db")
+cursor = con.cursor()
+
+cursor.execute(
+    """
+        CREATE TABLE IF NOT EXISTS Users(
+            id INTEGER PRIMARY KEY AUTOINCREMENT,
+            name TEXT NOT NULL,
+            age REAL NOT NULL,
+            email TEXT UNIQUE NOT NULL
+        )
+    """
+)
+
+cursor.execute(
+    """
+        CREATE TABLE IF NOT EXISTS Post(
+            id INTEGER PRIMARY KEY AUTOINCREMENT,
+            user_id INTEGER NOT NULL,
+            post TEXT NOT NULL,
+            FOREIGN KEY(user_id) REFERENCES Users(id)
+        )
+    """
+)
+
+cursor.execute(
+    "INSERT OR IGNORE INTO Users (name, age, email) VALUES (?,?,?)",
+    ('wilondja', 52, 'wilondja@gmail.com')
+)
+
+cursor.execute(
+    "INSERT INTO Post(user_id, post) VALUES (?,?)", (1, "Nous sommes les enfants de Dieu.")
+)
+cursor.execute("PRAGMA foreign_keys=ON;")
+
+con.commit()
+
+cursor.execute(
+    "SELECT Users.name, Post.post FROM Post INNER JOIN Users ON Post.user_id = Users.id WHERE Post.user_id=?", (1,)
+)
+
+result = cursor.fetchone()
+
+print(result)
+
+
+cursor.close()
+con.close()
\ No newline at end of file
diff --git a/crud_operation/crud/views.py b/crud_operation/crud/views.py
new file mode 100644
index 00000000..31a7b6be
--- /dev/null
+++ b/crud_operation/crud/views.py
@@ -0,0 +1,92 @@
+from crud.db import db_connection
+from crud.models import Model
+from services.color import change_color
+
+Model().user()
+
+class User:
+    def __init__(self, first_name, last_name, age, email):
+        self.first_name = first_name
+        self.last_name = last_name
+        self.age = age
+        self.email = email
+
+    def insert_user(self):
+        con, cursor = db_connection()
+
+        clean = self.clean_data()
+        if clean:
+            cursor.execute(
+                "INSERT OR IGNORE INTO Users(first_name, last_name, age, email) VALUES (?,?,?,?)",
+                (self.first_name, self.last_name, self.age, self.email)
+            )
+            con.commit()
+            change_color("\n ===> User added successfully", "\033[92m")
+
+    @staticmethod
+    def select_user():
+        _, cursor = db_connection()
+
+        cursor.execute("SELECT* FROM Users")
+        users = cursor.fetchall()
+        return users
+    
+    def update_user(self):
+        con, cursor = db_connection()
+        user_id = User.user_id('update')
+
+        cursor.execute(
+            "SELECT * FROM Users WHERE id=?",
+            (user_id,)
+        )
+        user = cursor.fetchone()
+        
+        new_age = self.age if self.age not in (None, "") else user[3]
+        if isinstance(new_age, str) and new_age.isdigit():
+            new_age = int(new_age)
+     
+        if user:
+            cursor.execute(
+                "UPDATE Users SET first_name=?, last_name=?, age=?, email=? WHERE id=?",
+                (
+                    self.first_name or user[1],
+                    self.last_name or user[2],new_age,
+                    self.email or user[4], user_id)
+            )
+            con.commit()
+            change_color("\n ===> User modified successfully", "\033[92m")
+        else:
+            change_color("\n ===> User doesn't exist.", "\033[91m")
+    
+    @staticmethod
+    def delete_user():
+        con, cursor = db_connection()
+        user_id = User.user_id('delete')
+        users = User.select_user()
+
+        user = [user for user in users if user[0] == user_id]
+        if user:
+            cursor.execute(
+                "DELETE FROM Users WHERE id=?",(user_id,)
+            )
+            con.commit()
+            change_color("\n ===> User delete successfully", "\033[92m")
+        else:
+            change_color("\n ===> Enter a valid id", "\033[91m")
+            
+    @staticmethod
+    def user_id(a: str):
+        try:
+            user_id = int(input(f"Enter a user_id to {a} : "))
+            return user_id
+        except:
+            change_color("Id can be a number.", "\033[91m")
+
+    def clean_data(self):
+        if not self.age.isdigit():
+            change_color("\n ===> Enter the action number")
+            return False
+        elif not self.email.endswith("@gmail.com"):
+            change_color("\n ===> Enter a valid email.", "\033[91m")
+            return False
+        return True
diff --git a/crud_operation/db/users.db b/crud_operation/db/users.db
new file mode 100644
index 00000000..e3a5fcfa
Binary files /dev/null and b/crud_operation/db/users.db differ
diff --git a/crud_operation/main.py b/crud_operation/main.py
new file mode 100644
index 00000000..5c1e991f
--- /dev/null
+++ b/crud_operation/main.py
@@ -0,0 +1,37 @@
+
+"""
+    USER MANAGEMENT
+"""
+
+from crud.views import User
+from services.action import actions
+from services.color import change_color
+
+
+while True:
+    print("\033[96m")
+    print(
+        """
+            ========= USER MANAGEMENT ==========
+
+            1. Show users list
+            2. Add user
+            3. Update user
+            4. Delete user
+            5. Quite
+        """
+    )
+
+    try:
+        action = input("Enter an action to perform : ")
+
+        if action == '5':
+            print("==== PROGRAM ENDED ====")
+            break
+        
+        if action.isdigit():
+            actions(action, User)
+        else:
+            change_color("Enter the action number.", "\033[91m")
+    except Exception as e:
+        print(str(e))
\ No newline at end of file
diff --git a/crud_operation/services/action.py b/crud_operation/services/action.py
new file mode 100644
index 00000000..799062a9
--- /dev/null
+++ b/crud_operation/services/action.py
@@ -0,0 +1,40 @@
+from services.color import change_color
+
+def inputs():
+    first_name = input("Fist name: ")
+    last_name = input("Last name: ")
+    age = input("Age: ")
+    email = input("Email: ")
+
+    return (
+        first_name,
+        last_name,
+        age,
+        email
+    )
+
+def actions(action, User):
+    if action == '1':
+        users = User.select_user()
+        print(f"\n ==> Users list <=== \n")
+        if users:
+            for user in users:
+                print(f"{user[0]} {user[1]} {user[2]} {user[3]} {user[4]}")
+        else:
+            print(f"Data is emtpy => {users}")
+
+    elif action == '2':
+        user = inputs()
+        if user:
+            User(*user).insert_user()
+        else:
+            change_color("\n ===> Incorect infos", "\033[0m")
+    elif action == '3':
+        user = inputs()
+        if user:
+            User(*user).update_user()
+            
+    elif action == '4':
+        User.delete_user()
+    else:
+        change_color("\n ===> Enter a valid action.", "\033[0m")
\ No newline at end of file
diff --git a/crud_operation/services/color.py b/crud_operation/services/color.py
new file mode 100644
index 00000000..3e49a966
--- /dev/null
+++ b/crud_operation/services/color.py
@@ -0,0 +1,17 @@
+import sys
+import time
+
+# ANSI CODE
+GREEN = "\033[92m"
+RED = "\033[91m"
+RESET = "\033[0m"
+
+def change_color(text, color_code=RESET):
+    sys.stdout.write(color_code)
+    
+    for t in text:
+        sys.stdout.write(t)
+        sys.stdout.flush()
+        time.sleep(0.05)
+    
+    sys.stdout.write(RESET + "\n")