// Define rotation matrix :ROTM RM0 0. 0. 0. :ROTM RMREFL_X -1 0. 0. 0. 1. 0. 0. 0. 1. // Define volumes and place them :VOLU world BOX 200. 200. 200. G4_AIR :VOLU mybox BOX 20. 40. 50. G4_AIR :PLACE mybox 1 world RM0 100. 0. 0. :PLACE mybox 2 world RMREFL_X -100. 0. 0. :COLOUR mybox 0. 1. 1. :VOLU mybox2 BOX 20. 40. 25. G4_AIR :PLACE mybox2 1 mybox RM0 0. 0. 25. :VOLU repl1 BOX 20. 10. 25. G4_AIR // needed, but only used for visualisation :REPL repl1 mybox2 Y 4 20. 0. :VOLU mytrd TRD 5. 10. 5. 10. 20. G4_WATER :PLACE mytrd 1 mybox RM0 0. 0. -25 :VIS world OFF