This animated scatterplot cycles through different pairings of the Iris flower dataset’s four measurements, swapping the x-axis variable every few seconds. It demonstrates a reusable chart module built with D3 v6, using `scaleLinear`, `axisLeft`, `axisBottom`, and `extent` to render the axes and points. The visualization also includes a color-coded legend for species and loads data from a remote CSV file via `d3.csv`.