This example demonstrates basic SVG shapes, showing two circles of equal radius positioned side-by-side, with only the second circle explicitly filled red. The underlying code is a minimal HTML page that uses raw inline SVG markup within the `index.html` file, placing the shapes in a coordinate system without any additional CSS styling or JavaScript logic. The visualization highlights how SVG’s default black fill contrasts with an explicit fill attribute, and the implementation relies solely on the browser’s built-in SVG support rather than external libraries.