Why can't I turn my iphone 4s on after the iOS6 update?

I updated my phone in the phone's settings about 4 hours ago and it said to shut it off to restart so I did that and then I guess I messed around and tried to turn it on a little while later because I thought I was supposed to turn it on after anyway so I plugged it into my computer and I'm pretty sure I held down the home and lock keys for several seconds and the apple logo started lighting up in like 5 second intervals and so I've been trying to turn it on by holding down the both buttons or just the lock button its self and it would still light up, but not do anything, and sometimes stay on the screen for a long time and then just disappear. What do I do?

Try connecting to iTunes, it saved my ipod 2 times.It'll ask you to restore it.

Restore in itunes

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