When does a Terminal/System create New child Processes (forks), and when it doesn't

["Susmita/Rajib" <bkpsusmitaa@gmail.com>]

Namaste, my illustrious List leaders and senior members,

I had already asked my question here:
https://lists.debian.org/debian-user/2021/06/msg00423.html

But i guess that owing to my continuing with a SOLVED thread i wasn't
able to draw attention.

Please post your replies on the above thread. I shall post a summary
here while acknowledging your comments and mark it solved.

I asked the question to restrict making multiple forks and  reduce
memory/processor load.

The screensaver code here:
https://lists.debian.org/debian-user/2021/06/msg00309.html
be saved as ssvr.sh executable.

Best.

Rajib
Etc.