This reusable scatter plot displays the Iris Dataset, cycling through four variables (petal width, sepal width, petal length, sepal length) on the x-axis every two seconds while keeping sepal length on the y-axis. Built with D3 v6, it uses `scaleLinear`, `extent`, `axisLeft`, and `axisBottom` to render axes, with `selectAll` and `join` for idempotent circle updates. The visualization animates via `setInterval`, calling the chart’s setter functions to update the x-value mapping. SVG rendering fills the browser window, with data loaded from a CSV gist.