How do i make an automatic file writing system? -

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i'm making automatic file writing system writes random numbers onto .txt file, need write .bat, problem i'm newbie batch!

this common problem, call autosave, code: 

(   echo %yourvariable% ) > mylittlevariable.sav

what do? when script reaches code, writes number %yourvariable% in .sav file, .sav can changed .txt or format.
want load variable now! code:

< mylittlevariable.sav (   set /p yourvariable= )

well want write random numbers! code random numbers:

(   echo %random%   echo %random% ) > random#s.txt

so how works? batch file, before having command in autosave batch writer have put echo, how echo makes statement in cmd, types after in autosave, too. code basic .bat:

(   echo @echo off   echo title basic autosave batch   echo :loop   echo set supervar=15   echo cls   echo echo hello, world!   echo echo supervar: %%supervar%%   echo pause   echo goto loop ) > mybasicbatch.bat

so, know know does, correct? hope helped you!
ps double amount of percent signs necessary, if had normal amount code wouldn't read properly!


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