David Hasselhoff straight to your Wallpaper

hoff.sh

#!/bin/bash

WORK_DIR=/tmp
curl -s https://gist.githubusercontent.com/schnapster/4a07648b28c63faac51955549b520b24/raw/thehoff.jpg -o "$WORK_DIR/thehoff.jpg"

# Every Friday at 11:05
(crontab -l ; echo "5 11 * * 5 open https://www.youtube.com/watch?v=dQw4w9WgXcQ") | sort - | uniq - | crontab -

osascript <<END
	tell application "Finder"
	set desktop picture to POSIX file "$WORK_DIR/thehoff.jpg"
	end tell
END

thehoff.jpg