In this tutorial series I will gradually build a house, doing the screenshots and describing their actions. I believe this will be very useful for beginners (possibly more!). We will build, of course, in Minecraft PE.
Where we left off in the previous part
Set aside the 3rd floor and back to our secret room. There I did a warehouse and a table. I decided to remove the table and make locking chests. (Read more about the mechanism - Lock on Warehouse
Remove the table, restore the floor:
Find a place for the mechanism:
Use the stairs to the upper chests were opened:
Starting to build the mechanism. Install the two piston at a depth of 2 blocks above and below. Send them to the chests:
Next, we will be a little difficult to install the piston. Here the desired position of the piston to the right, upward direction:
Will finish the mechanism and make tracks on the outside, we in the following guide.