This scatter plot animates through four Iris flower measurements (petal width, sepal width, petal length, and sepal length) every two seconds, swapping which variable appears on the x-axis while keeping sepal length on the y-axis. Each point is colored by species (blue, red, or yellow) with white outlines, rendered as SVG circles. The visualization uses D3 v6 APIs including `scaleLinear`, `extent`, `axisLeft`, `axisBottom`, and `selectAll(...).join(...)` within a reusable `scatterPlot` module. Data comes from a CSV of the classic Iris dataset, loaded via `d3.csv`.