first sleep and then hibernate after a certain amount of time

Hi there,

I would like to enable both, sleep and hibernate with my MacBook. For something like room transitions or just taking my macbook to uni, I'd like it just to sleep, so it turns back on instantly.

However, if it sleeps for quite a while, I'd like it to hibernate in order not to lose all the energy remaining.

So, is there a way to have the macbook go hibernate after an hour, say, of sleeping?

Sebastian