on open these_items

        set the_items_list to "" as string

        repeat with i from 1 to the count of these_items
                set this_item to item i of these_items
                set posix_path to POSIX path of this_item
                set the_items_list to the_items_list & " \"" & posix_path & "\""
        end repeat

        tell application "Terminal"
                do script "montage -background '#336699' -geometry +4+4 " & the_items_list & " ~/Desktop/montage.jpg"
                delay 1
                do script "convert ~/Desktop/montage.jpg -resize 900 ~/Desktop/montage.jpg"
                delay 1
                quit
        end tell

end open