Sentry Turrent Trap

[Torigoma]

I want to make a turret trap using pistons. but I can't get it to work right.

When a lever is switched, I want the top layer of pitons to fire first, and pull back the "cover", then the bottom layer to activate, raising the second layer to the level of a redstone signal, activating them and raising the turrets to firing level. Turing the lever off reverses it, with the second layer turning off first, then the third, pulling down the second layer, and then the first layer replaces the "cover" anyone know how to do this?

The Setup:
http://i181.photobucket.com/albums/x90/Mahikari/2013-05-14_041113_zpsa4751615.png

 

[OmegaPython]

How much do you know about redstone? It could be done easily with repeaters and some insulated wire, or if you know how, computers can work too.

 

[Torigoma]

How much do you know about redstone? It could be done easily with repeaters and some insulated wire, or if you know how, computers can work too.

Mined telling me how then? I've been trying to figure this out for the last 30 mins.

 

[Torigoma]

ANYONE know how? this is really frustrating.

 

[RandomMoped]

no