@echo off
set /a line01=%RANDOM% / 4096
set /a line02=%RANDOM% / 4096
set /a line03=%RANDOM% / 4096
set /a line04=%RANDOM% / 4096
set /a line05=%RANDOM% / 4096
set character01=A
set character02=B
set character03=C
set character04=D
set character05=E
set character06=F
set character07=G
set character08=H
set character09=I
set character10=J
set character11=K
set character12=L
set character13=M
set character14=N
set character15=O
set character16=P
set character17=Q
set character18=R
set character19=S
set character20=T
set character21=U
set character22=V
set character23=W
set character24=X
set character25=Y
set character26=Z
set character27=\
set character28=/
set character29=1
set character30=2
set character31=3
set character32=4

:: characters 27-32 are for padding
set /a numberofcharsdrawn=0
:drawchars
set /a charactertodraw = %RANDOM% / 1024
if %numberofcharsdrawn% lss 17 (
if %charactertodraw%==0 echo.
if %charactertodraw%==1 echo %character1%
if %charactertodraw%==2 echo %character2%
if %charactertodraw%==3 echo %character3%
if %charactertodraw%==4 echo %character4%
if %charactertodraw%==5 echo %character5%
if %charactertodraw%==6 echo %character6%
if %charactertodraw%==7 echo %character7%
if %charactertodraw%==8 echo %character8%
if %charactertodraw%==9 echo %character9%
if %charactertodraw%==10 echo %character10%
if %charactertodraw%==11 echo %character11%
if %charactertodraw%==12 echo %character12%
if %charactertodraw%==13 echo %character13%
if %charactertodraw%==14 echo %character14%
if %charactertodraw%==15 echo %character15%
if %charactertodraw%==16 echo %character16%
if %charactertodraw%==17 echo %character17%
if %charactertodraw%==18 echo %character18%
if %charactertodraw%==19 echo %character19%
if %charactertodraw%==20 echo %character20%
if %charactertodraw%==21 echo %character21%
if %charactertodraw%==22 echo %character22%
if %charactertodraw%==23 echo %character23%
if %charactertodraw%==24 echo %character24%
if %charactertodraw%==25 echo %character25%
if %charactertodraw%==26 echo %character26%
if %charactertodraw%==27 echo %character27%
if %charactertodraw%==28 echo %character28%
if %charactertodraw%==29 echo %character29%
if %charactertodraw%==30 echo %character30%
if %charactertodraw%==31 echo %character31%
if %charactertodraw%==32 echo %character32%
set /a numberofcharsdrawn=%numberofcharsdrawn%+1
goto :drawchars
)

:done
echo.
echo.
echo All done!
pause
exit