Three stylized tree branches form the central structure of this SVG visualization, built entirely with D3.js version 5. The code uses basic DOM manipulation—directly appending and styling `rect` elements through D3’s selection and attribute methods—to create a static, geometric composition on a 960×500 canvas. Two blue and one green rectangle are positioned around the center, each with a black stroke, demonstrating fundamental SVG shape creation without data binding or animation. The simple renderer approach highlights manual coordinate placement and hardcoded styling.