This document provides instructions for building a mobile app using Appcelerator Titanium. It begins by explaining the objectives of building an app and the assumptions about the intended audience's experience level. It then introduces Titanium and its capabilities. The document walks through creating a sample "Jokes" app, including setting up the Titanium development environment, configuring a new project, previewing it on simulators, and building out the app's structure and styling using XML and TSS files. The goal is to demonstrate the basic process and tools for designing, developing and running a simple Titanium-based mobile app.