When Do I Go Back Online? (Capture a combined ping/grep reply in a variable)

check_up.sh

#!/bin/bash
# WHEN DO I GO BACK ONLINE?
# Brady M. Shea - 23SEP2023
# For a StackOverflow answer (https://stackoverflow.com/a/77164885/503621)
# Original link: https://gist.github.com/bmatthewshea/87b70e3d75f8f8576cacdf1445daf4a6

# Variables/command subs
sleepy=60                  # PING every SLEEPY seconds. 1 minute recommended.
hosttoping=google.com      # can be google.com/etc. Should be a name based host. Not an IP.

#=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
checkinternet() {
  checkup=$(eval 'ping -4 -c 1 ${hosttoping} | grep "64 bytes"')
}
sleeptimer() {
  for (( count=1; count<=$sleepy; count++ )); do
    sleep 1;
  done
  printf "\n"
}
ts() {
timestamp=$(date +"%d %b %Y %H:%M:%S %Z")
}

#=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
ts && printf "\nStarted: ${timestamp}\n\n"
while
 checkinternet
 [[ "$checkup" == "" ]]
do
ts && printf "${timestamp} - Your ISP is (probably) down! No reply from google yet. Sleeping ${sleepy} seconds"; sleeptimer
done
printf "\n\nExiting.\n\n"
ts && printf "\n\nInternet is back up at: ${timestamp}\n"