A grid of fifteen colored rectangles renders a fixed dataset of five values repeated three times, with each rectangle’s width proportional to its value and its fill assigned a random RGB color via the custom `getRandomColor` function. The React component uses `d3.sum` to compute total width and `d3.selectAll` to append SVG `rect` elements, while the `FaceContainer` wrapper translates the group into the SVG canvas. D3 v7 and React 18 combine to generate the static layout without interaction.