Hello HTML
This example shows a simple target-like graphic composed of two SVG circles: a large yellow circle with a thick black outline and a smaller black circle centered inside it. The visualization is rendered as raw SVG markup embedded directly in an HTML page, with no external JavaScript libraries. The code uses basic CSS within a `<style>` tag to set the page margin to zero and hide overflow, while the SVG element itself specifies a 960 by 500 pixel canvas. The circles are drawn using SVG `<circle>` elements with explicit `cx`, `cy`, `r`, `fill`, and `stroke` attributes, demonstrating the fundamental building blocks of vector graphics in a browser context.