Mechanism Door

This MCPE contraption is a door that can be powered by: Lever, Button, Pressure Plate. This also comes with an iron trapdoor. This thing is built in the lab of D FloatingCOWW. He built this on 11/22/2015, on his MCPE 13.0 part 1 showcase. Here are the recipies:

2 Oak Planks, Lever, Wooden Door (any), Iron Trap Door, Oak Pressure Plate, and Wooden Button.

First, you place 2 Oak Planks on each other, then you put the wooden door beside it, and put a lever beside the door on the oak wall. After that, put an Iron trap door at the back of the wall on the first block, then you put a button ontop of the trapdoor, and then put a pressure plate on front of the trapdoor.