This example presents a three-dimensional scatter plot of the Iris dataset, mapping sepal length, sepal width, and petal length onto the x, y, and z axes. The visualization is built with Plotly.js, which renders the 3D markers, while D3.js is used to load and parse the CSV data from a GitHub gist. The layout configures colored axis backgrounds, gridlines, and zero lines, and the chart is drawn into a designated div using the `Plotly.newPlot` method.