Change Account Equity for practice account

I am not sure this is possible, but if so:

I would like a script/ea that will change my account balance (for a practice/game account)  to a fixed amount every x minutes.

e.g. I have an ea attached to a practice account and trades from this ea will cause its balance to change from time to time. I need a script/ea that will change balance back  to $5000, every 5 minutes.  

 I saw this on the internet...it would return the latest balance, but I also want the balance changed.

"using AccountEquity() on the Init() give me the latest balance value"