This example demonstrates a minimal web page that combines HTML, CSS, and JavaScript in a single file. The page renders the text “Hello HTML” in large, centered type, while the script logs “Hello JavaScript!” to the browser’s developer console. It uses plain HTML elements, inline CSS styling for layout and typography, and a basic `<script>` tag for console output. The example serves as a simple starting point for building data visualizations with web technologies, with no external libraries or data processing involved.