This example draws a simple geometric composition entirely in SVG, presenting two concentric red-and-black circles and a yellow rectangle with a navy outline on a 500-by-500 canvas. The code uses plain HTML and CSS, with the shapes defined directly in markup via `<circle>` and `<rect>` elements. This minimal starter demonstrates basic SVG rendering without JavaScript interaction or external libraries, making it a straightforward introduction to static vector graphics in the browser.