I deleted my internal hard drive, its the first hard drive in the disk utility

If you have lost your Hard drive for any reason, the best way to proceed may be to buy a new drive (one that that you will later install inside your MacBook) and an External enclosure to hold it while you do a new Install of Mac OS X.

Boot from your DVD and Install Mac OS X on the External drive. Once installed, you can boot just as easily from an External drive.

Then you can work on the old drive using the full power of Mac OS X. When you are satisfied, swap Internal and External and you regain portability.

If you have anything you want to recover that isn't backed up, read these directions:

https://discussions.apple.com/docs/DOC-1689

Otherwise, try booting with command R to see if it will restore the operating system that came with it.

If not, you'll need the original installer discs, or newer retail discs. Macs newer than March 29, 2010 but older than July 20, 2011 (or those that haven't had their model hardware updated since July 19, 2011) require AppleCare send you the original installer discs.

Apple provides a firmware update to support command-R booting for those Macs as well. But you have to have installed it before the erase happened.

Were you using Disk Utility while booted to your recovery partition?

OS X: About OS X Recovery - http://support.apple.com/kb/HT4718 - "OS X Lion, Mountain Lion, and Mavericks include OS X Recovery. This feature includes all of the tools you need to reinstall OS X, repair your disk, and even restore from a Time Machine backup without the need for optical discs."

You'll have to Reinstall OS X. To do that it depends on what model year Mac you have. But if you can still boot into the Recovery HD you can reinstall from that. At startup hold down the Command + r keys. then from the screen that comes up select Reinstall Mac OS X.

Insert the OS X reinstall disk that came with your Mac into the DVD drive aand restart the system. At the startup chime hold down the c key. That will boot the system from the DVD discs in the drive. If that doesn't work then hold down the Option/alt key at startup to bring up the boot slection screen and wait about 30+ second for the DVD disc to show up and select it. Once the system starts from that DVD disc use Disk Utility, found in the Utilities item in the menu bar, and Repartition the drive as One partition.

Then you can reinstall OS X from that original disc.

If the install still doesn't work or you can repartition the drive then most likely the drive has failed and might need to be replaced. Take the system to an Apple store to be properly diagnosed.

That is extremely difficult to do, as Mac OS X will not delete the drive it is running from. Please explain what you did.