This example presents the classic Iris dataset as an animated scatter plot that cycles through different feature combinations every two seconds. It demonstrates a reusable charting pattern where the plot’s axes, scales, and circles are recomputed on each update using D3 v6’s `scaleLinear`, `extent`, `axisLeft`, and `axisBottom` APIs. The visualization leverages D3’s `select` and `join` operations to update SVG circles and axis groups in place, producing a smooth transition between four variable pairings.