Twenty vertical SVG rectangles form a static bar chart from a hardcoded array of 20 numeric values. The bars are evenly spaced along the x-axis using a calculated offset based on the dataset length, with a fixed width and full chart height, so no data variation is encoded. The example uses D3 v4’s `d3.select`, `append`, `data`, and `enter` to bind the array and create the rectangles, demonstrating a basic SVG rect-based bar chart without axes or scales. An animation is not present in the visible code.