This example shows an incomplete smiley face drawn as a single SVG circle, with its radius left undefined in the markup. The rendering relies on the browser’s built-in SVG parser to interpret the `<circle>` element, though no explicit value for the `r` attribute is provided. The code uses no external libraries or APIs, and the element is placed directly in the HTML body. The data source originates from a v3 experiment by matt24ray, with the final output intended to form a happy face shape once the radius is defined.