PC PRANK VIRUS @_@

Type this in a notepad document on someones computer to prank them into thinking they have a virus!

Code:

@echo off
:hack
echo YOUR MESSAGE HERE (like, SYSTEM ERROR VIRUS FOUND)
goto hack

Then save the notepad document at a .bat file.
The next time someone opens it (like Arh2nd's mom) they will gte an unpleasent message therefore frekking them out!
EX:

mom-hey wats dis? (opens file)
Big black window appears
window-SYSEM ERROR VIRUS FOUND--ALL FILES DELETED
mom-HOLY @$!^%!!!

My sister was screaming at me when i told her it as fake...

How do I save it as a batch file?

Edit: I figured it out, and it's awesome.

I did it, but when I open it, it keeps copying its self.

I kno, but when the user sees all the warnings he/she will freak out!