A yellow smiley face fills the browser window, rendered as a head-and-shoulders portrait constructed from basic SVG shapes. The face uses a large yellow circle for the head, two black dot eyes, and a red mouth, all drawn relative to the screen center with explicit radius and offset values. Built with React and ReactDOM, the visualization generates an SVG element whose dimensions adapt to the viewport, positioning the face symmetrically and scaling its head radius to fit the available height.