This D3.js chord diagram visualizes how often five soda brands—7-Up, A&W, Coke, Dr Pepper, and Pepsi—share advertising blocks, with the matrix values encoded as chord width and color. Rendered as an animated SVG, the diagram uses `d3.layout.chord()` to position groups and chords, and `d3.scale.ordinal()` with a custom color palette. Hovering over a group fades the others, and tooltips reveal the exact shared-block counts. The visualization uses a viewBox and `preserveAspectRatio` for automatic resizing.