This example demonstrates a scatterplot of the Iris dataset that periodically swaps which measurement is plotted on the x-axis among sepal length, sepal width, petal length, and petal width every five seconds. It uses d3.csv to load the data and d3.scaleLinear to map data domains to pixel ranges, with axes rendered via d3.axisLeft and d3.axisBottom. Points animate smoothly through d3.transition with staggered delays, while the SVG rendering and join pattern manage enter, update, and exit selections.