This example shows a scatter plot of penguin measurements, with flipper length on the x-axis and body mass on the y-axis, colored by species (Adelie, Gentoo, and Chinstrap). It uses D3 v5 to fetch CSV data from a GitHub gist, parse it, and render SVG circles scaled by bill length and depth within each circle's radius. The plot includes axis labels and a title, with axes generated via `d3.axisLeft` and `d3.axisBottom`.