This example demonstrates how D3’s `scaleQuantile()` maps a numeric dataset to a categorical color scale, while `scaleLinear()` positions the data points horizontally. Fifteen circles are rendered in an SVG, each colored lightblue, orange, or lightgreen based on its quantile bucket. The visualization uses `d3.scaleLinear()` and `d3.scaleQuantile()` to transform the data array, and `d3.select("#wrapper").join()` to bind values to circle attributes. The source data is a hardcoded array of numbers, and the rendering is SVG-based.