This example visualizes quarterly electronics sales for major brands in 2022 as a 3D multi-series bar chart. Each brand has four bars representing Q1 through Q4, with a color legend differentiating the series. The chart uses `d3.x3d.chart.barChartMultiSeries()` to render bars in X3D, with data loaded from a CSV via `d3.csv` and scales from `d3.scaleLinear`. Axes are added using `d3.axisLeft` and `d3.axisBottom`, all built with React, D3 v5, and the d3-x3d and x3dom libraries.