This is 10 of the piston doors that I made.. Each of these doors shown have their own video in my channel.

Feature:
-Double State Door
-1-wide 3x3 Piston Door
-2x2 Semi Hipster Door
-5x5 Portcullis Door
-5x5 Slimeblock Hybrid Piston Door
-2x2 Seamless Glass Door
-3x3 Seamless Glass Door
-3x3 Piston Door.
-2-high Hipster Wall
-Flush Toggleable Hidden Nether Portal

Feel free to use it in your own build but don't claim it as your own creation.
Please don't spam the button
All was made in 1.8.7