This is a visualization of the Light Clock Diamond
based on my paper
"Relativity on Rotated Graph Paper" (Am. J. Phys. 84, 344 (2016); http://dx.doi.org/10.1119/1.4943251 )
which is briefly described in
"Spacetime Diagrams of Light Clocks"
https://www.physicsforums.com/insights/spacetime-diagrams-light-clocks/
