# in script or shell 1
loop init "my loop name"
i=1
while true; do
  loop control "my loop name"
  echo Iteration $i
  (( i++ ))
  sleep 1
done
echo End

# in script or shell 2
# ...sleep a bit
loop pause "my loop name"
# ...sleep a bit
loop resume "my loop name"
# ...sleep a bit
loop stop "my loop name"

basher install gitlab.com/shellm/loop