This example visualizes the Iris Dataset as an animated, reusable scatter plot built with D3 v7. It displays sepal and petal measurements as circles, cycling the x-axis variable every two seconds among petal width, sepal width, petal length, and sepal length. Using `scaleLinear`, `axisLeft`, `axisBottom`, and a custom `scatterPlot` function, it smoothly transitions circle positions and axis scales over a 2000-millisecond duration with `transition`. SVG rendering handles the marks, labels, and axes.