Smily face part 1
A yellow circle with a black outline forms the base of a smiling face, rendered as an SVG in a 960-by-500 viewport. Two smaller black circles serve as eyes, positioned at the upper left and right of the main circle. The example uses only native SVG elements—`circle` tags with explicit `cx`, `cy`, `r`, `fill`, and `stroke` attributes—with no JavaScript or external libraries. It demonstrates a static, hand-coded vector graphic, setting the stage for later parts that may add a mouth or other features.