This fork of ice7 displays an area chart of revenue by product category, with a black line overlay and circular point markers. The visualization aggregates revenue data from a CSV file using `d3.rollup` and `d3.sum`, then maps categories with `d3.scalePoint` and revenue with `d3.scaleLinear`. The SVG rendering uses `d3.area`, `d3.line`, `d3.axisBottom`, and `d3.axisLeft`, with rotated x-axis labels for readability.