This example shows four rectangular bars approximating a simple bar chart, with each bar varying in height and position along the x-axis. The visualization is drawn entirely with plain SVG `<rect>` elements inside an `<svg>` tag, using hard-coded pixel coordinates for placement and sizing. No JavaScript libraries or data-binding APIs appear in the code—the chart is static and rendered directly via SVG in the browser. The styling sets the body margin to zero and hides overflow, making the chart fill the viewport without additional layout interference.