Making things happen from a keystroke

I apologize in advance if this is dumb question. I’m very new to applescript but trying to learn.
What I am trying to do is run multiple frames in Apple’s DVD player a with a single keystroke.
I think it has something to do with asking the system events if a key was pressed but I can’t find it anywhere. What I would like to do is have this srcipt run everytime any old key on the keyboard is pressed.

tell application “DVD Player”
activate
repeat 50 times
step dvd
end repeat
end tell

Any help is greatly appreciated. This is for a very important art project.

try using ikey http://www.scriptsoftware.com/ikey/

Thanks for the response.
I have tried multiple 3rd party programs with hotkeys to run scripts and they work great with a modifier- Unfortunatly I need good old normal keystrokes. aaabbbcccddd…etc. Everyone wants an option, shift, control +a regular key. Know of any that don’t?

So far I’ve tried ikey, i do script schedular, do it now script schedular, and free hotkeys.

Try Quickeys X, a versatile, albeit expensive tool to trigger scripts.