This is a LEGO Moving Minifig Machine Module of the attraction "Parasol Chairs" from the video game "Theme Park" by Bullfrog Productions.
The module is powered by a LEGO Mindstorms NXT hub and uses a light sensor to detect people, as well as one for detecting the position of the rotating ride.

Learn about MMM here: https://cmt.dk/mmm
Source code on GitHub: https://github.com/LasseD/MMM

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