This example presents a simple genome map, visualizing four genes as horizontal bars positioned along a linear sequence. Each gene is rendered as a colored rectangle, with green indicating forward orientation and red indicating reverse orientation, and is labeled with its name. The code loads data from a JSON file using `d3.json` and creates SVG groups for each gene. Using `transition()`, the bars animate from a starting offset to their final positions, with delays tied to each gene's start coordinate, illustrating the relative locations of genetic features.