This example displays a blank red square rendered as an SVG canvas, demonstrating the minimal setup required to combine HTML, D3, and React in a visualization project. The code includes a 960x500 SVG element and uses d3.select to target it, then applies a red background via style. It serves as a bare-bones starter template, referencing d3.v5 loaded from a CDN. The visualization itself shows no data or marks, only the styled empty SVG, emphasizing the foundational structure for building more complex charts.