This example demonstrates a grid of solid-color circles arranged to show basic SVG shape construction and layering. It uses inline SVG markup within an HTML document to render ten circles with varying radii and colors, including a stack of nested circles at the right center. The circles are positioned using explicit `cx` and `cy` coordinates, with `fill` attributes defining their color. No external libraries or JavaScript are involved; the rendering relies entirely on the browser’s native SVG support, making it a static, code-only illustration of fundamental vector graphics primitives.