This visualization displays the classic Iris dataset, plotting petal length against sepal length. Each flower sample is rendered as a fixed-radius circle in an SVG canvas that fills the browser viewport. The code uses D3 v7's `csv` loader to fetch data from a GitHub gist, then employs `scaleLinear` with `extent` to compute domains for both axes. Axis ticks are generated using `axisLeft` and `axisBottom`, with the categorical iris species left uncolored in this minimal example. The rendering relies on D3's declarative selection-based joins to bind data to SVG circle elements, with dimensions set to the window's inner height and width.