This scatter plot visualizes the classic Iris Dataset, mapping petal length and width on the x- and y-axes, with each point colored by species (setosa, versicolor, virginica) via a custom marker function. Built with vanilla HTML and D3 v6, it uses `scaleLinear`, `extent`, `axisLeft`, and `axisBottom` to render SVG circles and axes. The data loads from a remote CSV using `d3.csv`, and the plot fills the browser window, with marks carrying additional sepal measurements as unused `rx` and `ry` attributes.