This example shows a simple SVG circle filling a 400×400 viewport, demonstrating the minimal setup for rendering with SVG inside an HTML page. The code uses no external JavaScript libraries; it relies solely on native SVG elements, defining a circle with center coordinates and a radius. The rendering approach is pure SVG markup, embedded directly in the body of the HTML document, with no data source or interactive behavior. It serves as a basic template for understanding how SVG shapes can be placed and scaled within a web page.