Equity Control Code

Hi guys,
I have a pretty simple request I think to all the coders out there.
I need a piece of code that it can be integrated into an EA that controls the Equity in the following manner:

Let us say we have an account with balance of $20.000. The trader enters a value of Equity of $18.000 after which level reached all open positions get closed. Also another option in the same block of code in a similar manner where the trader enters percentages of Equity let say 10% after which level reached all open positions are being closed.

Basically I need a code where all open positions will be closed by controlling the Equity through entered amount of money or through entered amount of %.

Here you go.......

Thanks a million kennyhubbard. This works great as an EA, but I was thinking more of a snippet that I can place in an existing EA's.
That way I can back test EA's with control over the equity.
Looking forward to your reply.