hey all! i haven't posted here in a long time but i thought i may as well share this here since i'm rather proud of making it work. this is a fairly simple 3x3 piston door. there are definitely smaller designs out there (and probably more resource friendly too), but this one does have a few pros: scalable up to 12x3 in size (and more could be chained on with repeaters), easy to build in a survival world, potential stairs leading to it, different floor and roof blocks, potential to install in a large room instead of a corridor, and an input right next to the door for easy access!

in the world, i've put a very rough cover over everything so you can see just how seamless it is. if you want to remove this and take a look at the insides, just run the command "/fill -5 100 -5 3 133 1 air replace white_concrete"

i'll be making a video in the next few days on how to build it, and i'll update this project when that's available.

hope you like it guys