To run the program, downlaod DrRacket here(https://download.racket-lang.org/) and open Minkowki.rkt with it. Then simply hit run.
You can use the arrows, space, WASD, lShift and rShift to do stuff! Up and down arrows = change scale Lef and right arrows = change velocity space = toggle light cone WASD = move red point lShift = toggle S gridlines rShift = toggle S' gridlines