Can't restore my iPhone 3gs?

I was trying to restore and update my iPhone 3gs, however, forgot to change SHSH blobs from Cydia ones to official ones, and clicked restore button on iTunes. The IOS was deleted, however, wasn't installed, because I was getting error all the time. After that, when I tried to change SHSH blobs, I wasn't able to do it, as the programs were not able to recognize me iPhone when I plugged it in. So what I got now: iPhone with no IOS, and I'm stuck, I can't install IOS.

They take 2-3 hours to fully restore but if it gets stuck at the applpe logo which most of them do all you got to do is hold the home button and the power button at the same time and it will power off or reboot.