Bash -- sleep until a specific time, like tomorrow midnight

loop.sh

#!/bin/bash

# Sometimes you want to sleep until a specific time in a bash script. This is useful, for instance
# in a docker container that does a single thing at a specific time on a regular interval, but does not want to be bothered
# with cron or at. The -d option to date is VERY flexible for relative times.
# See 
# https://www.gnu.org/software/coreutils/manual/html_node/Relative-items-in-date-strings.html#Relative-items-in-date-strings
# For details
# ALPINE USERS: You will need to install coreutils, as the built-in busybox date does not handle -d correctly.

# This script runs in an infinite loop, waking up every morning at 3:00AM

WAKEUP="03:00" # Wake up at this time tomorrow and run a command
while :
do
    SECS=$(expr `date -d "tomorrow $WAKEUP" +%s` - `date -d "now" +%s`)
    echo "`date +"%Y-%m-%d %T"`| Will sleep for $SECS seconds."
    sleep $SECS &  # We sleep in the background to make the screipt interruptible via SIGTERM when running in docker
    wait $!
    echo "`date +"%Y-%m-%d %T"`| Waking up"
    # Run your command here
done

Could you do this but with a "run every minute" example (which is slightly different than run in a loop and sleep 60 seconds?)