Place the following sourcecode into a notepad and save it as a batch file, open it and enjoy the matrix effects. To change the output add characters where it says:
set s=¹ºÂÃÄÅÆÇÈÉÊÒÓÔÕÖ×ØÙÚâãäåæçèéêòóôõö÷øùúÿÚ

Cheers :)

@echo off
title Anonymous Matrix Batch System
color 0A
:top
@echo off
set pas=
set s=¹ºÂÃÄÅÆÇÈÉÊÒÓÔÕÖ×ØÙÚâãäåæçèéêòóôõö÷øùúÿÚ
set m=0
:loop
set /a n=%random% %% 75
call set pas=%pas%%%s:~%n%,1%%
set /a m=m+1
if not %m%==75 goto loop:
echo %pas%
Goto top