wallclock is a Bash script which will display wallpaper clocks on computers running Linux with the GNOME desktop environment. It is designed to be run using the cron job scheduler, so users must add a line to their crontab file to run the script. Setting up the wallclock script does not take long and detailed step-by-step instructions are available so that users unfamiliar with editing their crontab file can easily set the script up.