delayed momentary short circuit

[chylld]

heyas,

as you can probably tell from the subject title i'm quite foreign to electronics but here's my problem: i need to design a circuit that has inputs +9V (or anything really), Gnd, A, B, X, Y. A, B, X and Y are normally not connected. power is provided at +9V and after 3-5 seconds, A connects to B and X connects to Y for a short time (~0.5 secs) and then they diconnect. the +9V stays on since it gets applied at the beginning.

fyi, the A-B and X-Y pairs correspond to the power switches on 2 devices that i'm attempting to turn on a short time after voltage appears on the +9V input. i'd like to avoid using relays if at all possible, due to cost. is what i'm trying to do possible, and if so could someone please point me in the right direction?

Thanks in advance
Jonathan.