I accidentally erased Macintosh HD using Disk Utility please help

Hello I feel so dumb right now, It all started out by me just purchasing a Mac Mini today and the guy never restored it to factory settings so I decided to give it a try so I looked it up on Google and tried the first thing that popped up and I ended up erasing my Macintosh HD and now when I hit Alt on startup it shows Recovery only and then it'll load up to the Mac OS X Utilities screen and I don't have a restall disc either Any help would be greatly appreciated, thanks

P.S I have 10.7 Lion if that helps.

In Lion Recovery is there an option to reinstall? If so it should download Lion for you. Been a while since I messed with Recovery. Be sure it's connected to the Internet.

From LION forward there ARE NO recovery DVD's. It's all in the cloud.

Thanks for the reply however when I hit "Reinstall Mac OS X Lion", it says click Continue but there is no continue button. Here is a pic:

http://postimg.org/image/5q2e1k215/

Not sure if the pic was correctly posted or not I'll try again:

press the enter key

or

scroll down the screen to see the continue button