A collaborative whiteboard was built using Python, Flask, and Twilio Sync to enable real-time editing by multiple users. The application uses Flask as the web framework, Twilio Sync for state synchronization, and Canvas API for drawing graphics on a web page. The project requires a computer with Python 3.6 or newer, a free Twilio account, and a virtual environment setup. The dependencies were installed using pip, and the Twilio service was set up to authenticate users with access tokens. The application implements the back end using Flask routes for generating tokens and rendering templates, as well as the front end using HTML canvas and JavaScript for drawing and interacting with the whiteboard. To enable real-time collaboration, the application uses Twilio Sync's Message Streams to publish and subscribe to drawing data. The whiteboard also includes features such as changing colors and clearing the drawing, and mobile touch support was added by binding events to canvas touch events.