This example demonstrates how to build SVG graphics by hand, using raw SVG elements and CSS for interaction. It shows two distinct compositions: a circular arrangement of colored circles, and a separate SVG canvas with a scatter of black points. The first cluster uses plain SVG `<circle>` elements with fixed coordinates and fills, while a CSS `:hover` rule changes the fill of a central circle. The code relies directly on the browser’s SVG DOM APIs and CSS selectors, with no external libraries, rendering purely through static markup.