This example shows an animated scatter plot of temperature data over time, cycling through multiple cities from the Iris Dataset. It visualizes yearly temperature readings (in Kelvin) for each city, with circles colored by city and positioned along the x-axis for year and y-axis for temperature. The visualization uses D3.js v7, loading data via `d3.csv`, parsing dates with `d3.timeParse`, and rendering SVG circles with scales like `d3.scaleLinear` and `d3.scaleOrdinal`. A `setInterval` triggers periodic updates, redrawing the plot for each city every two seconds.