It's a door; it opens and closes.
Closes in .7s and opens in 1.6s - No input delay
Usage: flick lever
Components used;
Major components that were used in this door are budded slime rep 0t clocks and regular slime 0t reps and just normal budded 0t reps. Otherwise it's just well timed circuitry that's all tied together to make it work smoothly and efficient sequencing.
Main difference between this 7x7 and my previous one is size and speed as the previous one has 0.1s input delay; this one doesn't have any input delay and it's smaller by around 3k blocks + it uses no entities to achieve this size; it is smaller than the one on the door's plot next to the visitors area said door there even uses entities.
If you wish to look at the fold in the back of the door you can remove the torch from the etho hopper clock so the door starts clocking and you can have a look at everything. Just make sure to place the torch back before unloading the chunks as to not break the door.