This example shows a simple yellow circle with two smaller black circles, forming a basic smiley face on a blank page. The SVG markup uses inline `<circle>` elements with explicit `cx`, `cy`, and `r` attributes for positioning and sizing. The page layout is controlled through CSS with `body` margins removed and `overflow: hidden`. The visualization relies solely on raw SVG syntax, not on any JavaScript library or data binding, and renders statically without interaction or animation.