This reusable D3 scatterplot visualizes the Iris dataset, cycling through four flower measurements every two seconds to show different variable relationships. Built with D3 v7, it uses a custom scatterPlot function with `scaleLinear`, `extent`, `axisLeft`, and `axisBottom` to render SVG circles and axes. The animation loop calls `plot.xValue()` to dynamically swap the x-axis variable, demonstrating the reusable pattern’s flexibility. Data loads from a CSV via `d3.csv`, with coordinates recalculated on each update.