This example displays 200 points that are randomly repositioned on a two-dimensional plane every two seconds. Each point shifts to a new location based on freshly generated random x and y coordinates, demonstrating a transition between data states. The visualization uses the `viz.point()` API from the Viz.js library, building on D3 v4, to render the points as SVG shapes with a steelblue fill and stroke. The `point.transition()` method animates the movement of each point to its updated position, while the code explicitly resets the key and value scales before each update to recompute the coordinate mappings.