This example demonstrates JavaScript programming fundamentals in a bare-bones HTML page. It showcases variable mutation with `const` objects, arrow functions with implicit and explicit returns, and a `for` loop. The code defines a `person` function using ES6 shorthand and logs results to the console. The visualization itself is static, containing only an empty SVG element, while all activity happens in the browser’s developer console. The page uses plain CSS and JavaScript, with no external libraries.