This example shows a static SVG traffic light with three vertically stacked circles—red, yellow, and green—mounted on a grey pole. The visualization uses plain SVG elements—`rect` and `circle`—wrapped directly in the HTML, rendered by the browser. No external libraries or JavaScript interactions are present; the page is a bare HTML file with inline SVG, demonstrating how basic shapes can construct a simple, recognizable diagram. The code does not animate the lights or change states, presenting only a fixed, neutral illustration.