This is a modified version of the Penrose “Impossible” Triangle which is an interesting example of how the brain can be fooled. The main difference in this version is the use of hardware to simulate the triangle side connections. Watching the video is the easiest way to see how it works: https://youtu.be/_B2D5h74mMA More Info: https://www.instructables.com/id/Penrose-triangle-modified/