My latest project, Microcosm, took a little longer but it has been worth it.
Microcosm is a port of Terry Welsh's awesome screensave with the same name
It is best enjoyed on a recent version of Chrome and a reasonably powerful machine.
If necessary, you can adjust the detail-setting in the config screen to make it work on weaker machines including many mobile devices.
The config screen also has many additional customization options worth exploring.