This example shows a static bar chart with three orange rectangles representing the values 5, 10, and 12, each labeled with white text. The chart is rendered as an SVG using d3.v4, though the bars are manually placed in groups rather than generated dynamically. The page also includes commented-out code demonstrating a CSS transition that changes a div’s background from magenta to red over ten seconds, alongside a basic README referencing a React starter template.