This example displays a simple static visualization consisting of a grey rectangle and a circle rendered in an SVG canvas. The code uses d3.csv to load median income data from a CSV file, but the loaded data is not connected to the shapes. The rectangle is positioned with explicit x and y coordinates, while the circle appears at a fixed location without any fill color specified, making it use the default black fill. The visualization demonstrates basic D3 selections and SVG shape creation with d3.select and `svg.append`.