Reading (For Dummies)

Applescript question

Here's what I want to write. A stupid applescript that does this:

do shell script "export DISPLAY=localhost:0;/usr/X11R6/bin/xterm"
quit

So it should pop open an xterm on my screen, and then quit. The quit for some reason makes the the applescript interpreter quit or something, leaving the script program "running." I'd prefer it to quit so I can click and launch it again, and open another xterm. Kind of like the little xterm button you get under gnome/kde/etc. Anybody know how to do this?