This scatter plot visualizes the Iris dataset, showing the relationship between petal width and sepal length. Points are colored by species (setosa, versicolor, virginica) with white strokes against a blue background. The visualization uses D3.js APIs including `scaleLinear`, `axisLeft`, `axisBottom`, and `extent` to map data coordinates. Data loads from a CSV URL and renders as SVG circles with a configurable radius. A custom module pattern enables dynamic updates to the x-axis value, which cycles through different columns.