This example shows a dense field of randomly positioned, semi-transparent rectangles and circles rendered with React and SVG, each with randomized stroke widths, opacity, and dynamically generated RGB colors. The layout is produced by a fixed array of 200 values calculated from a simple arithmetic formula, mapped through React components to create the visual elements. Using D3 v7 only to select the body and append a base SVG, the code primarily relies on React’s `ReactDOM.render` and custom components like `My_circle` to generate the shapes, with no interactive or animated behavior.