This example shows a yellow smiley face drawn with SVG shapes, featuring two black eyes and a curved mouth. The face is centered on a 960x500 canvas, with the head as a yellow circle outlined in black, offset eye circles, and a mouth created using the d3 `arc` function. React renders the SVG elements, while D3 v6 computes the mouth’s path geometry. The code uses fixed pixel values for positioning and sizing, and the smiley is drawn entirely from code with no external data.