This example displays the text "Hello HTML" in the center of a page, with a font size set to 13em. It serves as a minimal demonstration of inline CSS styling and JavaScript execution. The page uses a `<style>` block to center and scale the text, while a `<script>` tag calls `console.log('Hello JavaScript!')` to write to the browser's developer console. The code is plain HTML, CSS, and JavaScript with no external libraries or frameworks.