This example shows a simple smiley face constructed from three SVG circles: a large yellow head and two smaller eyes. The face is centered in an SVG canvas, drawn with a black stroke. The code uses basic SVG elements (`circle` tags) within a manually authored `svg` markup, with inline styling for body margins and overflow. No JavaScript libraries or data sources are involved; the visualization is purely declarative HTML/SVG, as seen in the static `index.html` file.