tell application "System Events"
 -- RANDOM ROTATION OF A FOLDER OF IMAGES
 tell current desktop
 set picture rotation to 1 -- (0=off, 1=interval, 2=login, 3=sleep)
 set random order to true
 set pictures folder to file "Mac OS X:Library:Desktop Pictures:Plants:"
 set change interval to 5.0 -- seconds
 end tell
end tell