This example renders two layered SVG scenes on top of each other, each filling the container. The first scene draws seven semi-transparent circles with varying radii and positions, while the second places seven rectangles at matching coordinates, creating a mixed geometric composition. Both layers use a pastel green background and encode data through position, size, and color. The visualization is built with D3 v7, using `select`, `selectAll`, `data`, and `join` to bind static arrays of circle and rectangle objects to SVG elements. It demonstrates a simple declarative approach to generative art without interactivity or animation.