The red-ish points are set at the beginning, and the mouse movements drop blue-ish points. All points move randomly, and every umpth of a second a Delaunay triangulation of the points is recomputed.
[](https://github.com/Fil/) Questions and comments welcome on [gitter.im/d3](https://gitter.im/d3/d3), [twitter](https://twitter.com/@recifs) or [slack](https://d3js.slack.com).