Minecraft Redstone Powered Door

Step 1: Materials

2 Sticky Pistons
About any 2 stacks of any block
About 30 Redstone
1 lever

Step 2: Make the Door

Make the door and walls this might take about 30 diamond blocks

Step 3: Redstone

Add some Redstone right from your lever (where the sticky pistons are) and make some blocks for the Redstone to touch the pistons

Step 4: Tryin It Out When It Is Done

Try it out when it looks like this.
Pull the lever and if the inside disappears and its replaced with diamond block it works.

Step 5: Now Make Your Room

CONGRATS! YOU HAVE FINISHED IT!