This example displays a color wheel generated from a CSV file, where each slice represents a row and is filled with its corresponding RGB hex value. The visualization uses React’s `useState` and `useEffect` hooks to load data with `d3.csv`, while `d3.pie` and `d3.arc` compute the angular layout and SVG paths. A loading state shows text until the data arrives. The final chart is rendered as SVG elements inside a React component.