ImageMagick - Take screenshot of the entire screen forever

#!/bin/bash
set -e
# Description: Take screenshots of the entire screen on every second forever.
#    Useful when you also need to click on UI.
# -q or -s is optional. They are used to disable the beep sound when screenshot is taken.
 
no_beep=$1
 
while true; do
    # Wait for 1 second.
    sleep 1s
 
    output_filename=screenshot_$(date +%Y-%m-%d_%H.%M.%S).png
 
    # Whether to beep or not.
    if [ "${no_beep}" = "-q" ] || [ "${no_beep}" = "-s" ]; then
        magick import -silent -window root "${output_filename}"
    else
        magick import -window root "${output_filename}"
    fi
 
    echo "${output_filename}"
 
done