A model of a traffic light in openscad. To create an USB controlled traffic light for your desk, equip this with the electronics described here: github.com/holgero/XFD .
See it in action: youtube.com/watch?v=HyK4Re3XgTo
STL (Stereolithography, filesize: 1.53 MB), OTHER (Other, filesize: 4.03 KB)