How to play things backwards with the help of AppleScript

Today, in this video, you're going to learn how to make a simple program that can allow you to play stuff backwards, like a song, with Xcode and AppleScript on your Mac OS X computer. This application will be well worth showing off to your friends.

Code:

on clicked theObject
start progress indicator "Spinner" of window 1
set my_track to choose file set volume 7
--second, open QuickTime and start playing
tell application "QuickTime Player"

close every window
open my_track
set my_movie to first document
set ts to time scale of my_movie
set current time of my_movie to 60 * ts
--start playing backwards
set rate of my_movie to -1
end tell
stop progress indicator "Spinner" of window 1

end clicked