But I need a horizontal one... Do you have any ideas about what's wrong with mine?
Just whipped this up:
EDIT:
The above design of the horizontal door is slightly flawed. You should still be able to apply a similar idea though. New design
The idea is to delay the pistons pushing the other pistons out, and have the pistons being pushed out only activate when pushed into a live line. That way when they go out the pistons push the other pistons and the blocks out first, then the blocks are first forward, and when they come back in, the live line is now off, so the piston goes first, and the delay on pistons pulling the other pistons and the blocks back in are last. If that makes any sense?
Can I has Paintlery pack code?
I'll PM you the zip. EDIT: Unless all you need is this code? I have no idea where to get that or how you'd use it. :S