This example displays the classic Iris dataset as an animated scatter plot, cycling through different x-axis variables every five seconds. The visualization builds a reusable D3 chart with a custom function that handles scales, axes, and circle elements. Circles enter with a growing radius transition and update their positions smoothly using `transition().duration(1000)` with staggered delays. The code uses `scaleLinear`, `axisLeft`, and `axisBottom` from D3 v6, rendering as SVG with black-and-white styling against a full-window canvas.