Hello,
if you used the following command :
Code:
/System/Library/Frameworks/ScreenSaver.framework/Resources/ScreenSaverEngine.app/Contents/MacOS/ScreenSaverEngine -background &
Then, you have launched a process that is running in a background task (this is what "&" means). That is to say, even if you quit your terminal command, it will still be running.
In order to get back to your former background, you have to kill that process.
To identify the PUID of that process, execute :
Code:
ps | grep ScreenSaverEngine | grep -v grep | cut -d " " -f1
This command will give you a number (the PUID) that identifies this process.
Finally, you have to kill that process :
where PUID is the number returned by the previous command.
There it is
😉
NOTA : if you restart your computer, this process shall not be launched again, so your former background should get back.