stupid script to change all wallpaper in mac

change-bg.scpt

set bgFile to "path/to/wallpaper.jpg"
tell application "System Events"
	repeat with i from 1 to 7
		set theDesktops to (a reference to every desktop)
		repeat with x from 1 to (count theDesktops)
			set picture of item x of the theDesktops to bgFile
		end repeat
		delay 1
		key code 124 using control down
	end repeat
end tell