SVG Fundamentals
This example demonstrates the fundamental building blocks of SVG graphics through two circles drawn on a blank canvas. It shows how to create basic shapes using declarative XML-like syntax, with the first circle using default black fill and the second explicit red fill via the `fill` attribute. Written in plain HTML with inline SVG, the visualization requires no JavaScript or external libraries, relying solely on native browser SVG rendering. The code highlights the direct relationship between SVG coordinates and visual output, offering a minimal starting point for more complex data-driven visualizations built with React or D3.