How to make a sliding door in minecraft with a lever

Materials: 6 Pistons, 4 Pressure plates, 2 Redstone torch's, 14 blocks,12 Redstone and 4 glass blocks

Alright let's get started.

Place 3 pistons on top of each other, then 4 blocks to the right, do the same.

(make sure there facing inwards)

Dig a 2 block hole as shown in the the picture.

Place a block on either side on the middle of the 3 pistons and put a redstone torch under and redstone dust on top.

Cover up your hole, then, place your pressure plates 2x2 on each side.

Now put your glass blocks on the sticky pistons.

In this step you just cover up anything that you want to.