Is there a way to screensaver the command line, screensaver.exe ("dosbox-x.exe DoublePendulum.exe -fullscreen")

[CommandlineUser]

is there a way to screensaver the following command line?

i hope to learn and know some kind of windows' internal command form from the forum, lets say that command is screensaver.exe

screensaver.exe ("dosbox-x.exe DoublePendulum.exe -fullscreen")

i know how to use this way 1>nul 2>nul reg query "HKCU\Control Panel\Desktop" /v "ScreenSaveActive"
but i dont know how to get it to work with an EXE

or maybe i could try someone's program screensaver.exe if there is one.