How to reinstall osx when you deleted your drive??

When you "deleted" your drive, it is probably the startup partition. Restart your mac while holding CMD+R, you get in the Recovery Partition. Start DiskUtility and check if your startup drive is correctly formatted, Mac OS Extended (journaled). If not format (erase) the drive correctly. Then Quit DiskUtility; and choose "Install OS". It will install your OS. You need a good internet connection. It can take some time.

Lex

On the back of your MBP is the serial number. Enter it here and post back the model/year information.

https://selfsolve.apple.com/agreementWarrantyDynamic.do

Ciao.

This happened while you were in the Recovery Partition?