This visualization shows the evolution of music format sales in the United States from 1973 to 2019, with each format appearing as a colored band that widens to represent its annual revenue. The chart uses a bar-on-bar layout where a white background mark for each year is overlaid with the format-specific segments. The visualization is built with React and D3 v5, employing `scaleLinear`, `scaleBand`, and `scaleOrdinal` for scaling, while the `nest` and `sum` functions aggregate the raw sales data. The background image and SVG rendering create a stylized, poster-like presentation of the dataset.