This example displays a static “Hello World!” message centered on a blank page, demonstrating the foundational structure of an HTML document with embedded CSS styling and JavaScript. The page uses a CSS class to set the font size and text alignment of the message, while the HTML body contains the content. No external libraries are used; the example relies solely on core web technologies—HTML for markup, CSS for presentation, and JavaScript for potential interactivity. It serves as a minimal template for building more complex visualizations from scratch.