This animated scatter plot cycles through different pairings of Iris flower measurements, showing petal width, sepal width, petal length, and sepal length on the x-axis while sepal length remains on the y-axis. The visualization uses D3.js to load the Iris dataset from a GitHub gist and renders colored circles representing three species (setosa, versicolor, and virginica) with a custom legend. The reusable scatterPlot module employs D3 scales, axes, and data joins to update the plot at regular intervals.