Uploaded November 2020 | Updated September 2026, 3 weeks ago

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This is a tiny 4x4 shutter door by me and lum3nd0. It has a nice and sync animation and at only 360 blocks.

Feel free to comment down below if you have any problems when building this door.

Explanation point(s) that I forgot:
- The bottom middle double (yellow) does the retraction by the powering of the hopper from the redstone block followed by the observer. The piston adds 1 tick of delay, resulting of an accumulated delay of 3 ticks to the hopper, and the floor block is powered at t=4 which buds the piston and will retract at t=5.

There is an unlisted video with more detailed (and rambling) explanation video, you can check it out here:
youtube.com/watch?v=9Q7J-pmaq6U

lum3nd0's channel:
youtube.com/channel/UCKRLsb8u7ksvIpDDWrtmTWQ

lum3nd0's tutorial video on this door:
youtube.com/watch?v=OcHXn1XnneY

Uses peterjiangTW's ocd+ texture pack.
Version used: 1.16+
Video link:
youtube.com/watch?v=8MNr-uT4JrU

Detailed specs:
4x4 Door
Creator: MYuen222, lum3nd0
Size: 360 blocks (12 long, 10 tall, 3 wide)
Versions: 1.11+
Closing time: 0.55s
Opening time: 0.65s
Date of completion: 03/11/2020
Additional information: Clockless, Sandless, Entityless

Thanks for watching.