Run a job without Crontab/Cron job

 Inorder to run a script to keep on running in active window

countdown()
(
  IFS=:
  set -- $*
  secs=$(( ${1#0} * 3600 + ${2#0} * 60 + ${3#0} ))
  while [ $secs -gt 0 ]
  do
    sleep 1 &
    printf "\r%02d:%02d:%02d" $((secs/3600)) $(( (secs/60)%60)) $((secs%60))
    secs=$(( $secs - 1 ))
    wait
  done
  echo
)
while true; do nj_cc ; echo "----Sleeping----"; countdown "00:10:00" ; clear ; done

Caffeine Customization

caffeine.exe 5 -key:0E (for easy testing)
caffeine.exe 50 -key:0E (for a mandatory screen saver set at 1 minute)

Create a batch file with below content :

cd C:\njabade\Personal\Softwares\caffeine

start caffeine64.exe 50 -key:0E

 https://www.zhornsoftware.co.uk/caffeine/