This example shows a simple smiley face constructed from three SVG circles: a large yellow circle for the head and two smaller black circles for the eyes, all centered on a 960 by 500 canvas. The drawing uses the Scalable Vector Graphics (SVG) API directly within an HTML page, with the `circle` element specifying `cx`, `cy`, `r`, `fill`, and `stroke` attributes. The code does not include a mouth, leaving the smiley face incomplete, and the page’s body margin is set to zero to ensure the SVG fills the viewport.