This animated scatter plot cycles through four Iris flower measurements—petal width, sepal width, petal length, and sepal length—as the x-axis variable every two seconds, while sepal length remains fixed on the y-axis. Each data point is color-coded by species (setosa, versicolor, or virginica) using `d3.scaleLinear`, `d3.extent`, `d3.axisLeft`, and `d3.axisBottom` to render axes and circles. The visualization uses D3 v6 with an SVG rendering and updates the plot in-place via `setInterval` and a custom `scatterPlot` module, drawing from a remote CSV dataset.