A chic, solid yet secure 3×3 door.
The secret of this door is that the upper and the two pistons on the side are normal pistons that simply retract. The lower piston, on the other hand, is a double piston.
Instructions:This is how you build the double piston:
The retract uses a so called "Pose extender" which gives a short signal only:
Now you just have to connect the rest of the pistons, which is easy enough to build without instructions.
For the block in the middle of the door, it is recommended to use a block that is symmetrical in itself, such as:
- emerald block
- Silicified stone tile
- redstone lamp
- tree trunks