The Project Lighthouse was built by students at Kiel University. From my perspective, I am drawn to the thought that they used LED lights that were programmed to turn a different color when the time came. They probably programmed a timer that allowed each light to be on a specific color for a certain amount of time. This project had to have a bunch of people to put this together. It must have took at least 8 - 10 people to complete the LED lights then another 10 to put it together. All together the whole project should've took them about 3 - 6 months or maybe more. There were most likely tons of trial and error to complete this difficult project but it turned out to be a successful project.
https://www.youtube.com/watch?v=VU26qkZiyl8