This example visualizes listening time versus songs played from a Spotify habits dataset, plotting each week as a circle where size reflects artists discovered and color indicates mood score. It uses D3.js’s `scaleLinear`, `scaleSequential`, `interpolateTurbo`, `axisLeft`, and `axisBottom` to construct the scatter plot. The data loads from a GitHub Gist CSV file, and the reusable `scatterPlot` module renders SVG circles with hover tooltips.