This example displays a stepped area chart of a time series where values rise in distinct plateaus from zero to 80,000, then fall back to zero. The chart uses an SVG path generated by d3.area, with d3.axisBottom and d3.axisLeft for scales, and linear scales for both x and y dimensions. Data is provided as a hardcoded array mapped to x/y points, rendered with yellow fill on a red background. The visualization demonstrates how d3.v7 constructs area shapes from discrete data points.