A robot designed to hold a camera (you need to make your own attachment to fit to the top piece) and the robot can be remote controlled to do pan and tilt actions or it can turn slowly and controlled for making a Time lapse - see the video for examples of both and my blog for an example of an attachment for most cameras.
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Help Guide - BI File Types
This MOC also has a 3D digital file available (eg LDD, MPD, etc): 3D Model