This example demonstrates an animated scatter plot of the Iris dataset, cycling through different sepal and petal measurements on the x-axis while keeping petal width on the y-axis. D3 version 6.7.0 is used via UNPKG, with the `csv` method loading data and `scaleLinear`, `axisLeft`, `axisBottom`, and `extent` powering the axes. Circles are colored by species through custom logic, and a `setInterval` timer updates the plot’s x-value accessor every few seconds, re-rendering the SVG to cycle between four measurement columns.