An SVG circle with a radius of 20 units forms the basis of a smiley face. The example demonstrates how to construct a simple visual from basic SVG elements within an HTML document. The rendering relies on the SVG circle element, with the face’s features implied but not explicitly drawn. The code uses the HTML5 SVG API directly, embedding the circle inside an inline `<svg>` tag without external libraries or JavaScript. The result is a minimal, static graphic that illustrates fundamental vector-shape creation.