Due to what appears to be the lack of feedback from other people and some difficulties with the texture pack, it will take awhile longer to make the map, and so I am sorry.
I have finally found a way to make this map, also due to this method the size of the floors will be about 79x71 which is 5609 blocks! which is much better than the 20x20 I had before but because of this it will take me awhile to finish the map so if you want to help out, it'll be greatly appreciated!
How to help:
If you wish to help me, the main things I need help with are the floors and resource pack. (a floor is something like an area of the nether or a town or a warehouse)
How to help me with the floors: To help me make the floors you must make a 79x71 area or smaller and save it as a .schematic file.
How to help me with the resource pack: To help me with the resource pack I need textures for the following:
Pumpkin - Make the entire screen look dark
Iron - Make it look a bit more like the doors of a modern elevator
Sea Lantern - Make it look a bit more like the lights of an elevator
Any Dried Kelp Block - Make it look like the sea lantern edit but turned off
But if you cant do this for some reason, you can always just ask to be a beta tester!
Now, to the original post. I found a map called The Elevator but it was unfinished, broken and overall was terrible so I decided to remake it as it as it had great potential.
This is just a ņ̶̢͍̭̱͙̪͗̋̀̈o̵̼̺̗̘̅̌̓̾̌̈́́͜ṟ̷̡̢̦͑̀͝m̷͇̂a̸̼̞̪͑̔̉͝l̶̫̱̼̻͕̔̓̕͘ͅ elevator. Nothing wrong, nothing g̶̙͓̯͈͌ͅl̵̻̼̙̭̭̏̋͗͑ͅi̷̡̛̮͇̼͉͐̃̂̍̿͒͌̌t̶̢̫̥̳͎͎̣̳̂c̴̡̺̺̺̓̃͑̓͂̒͜h̴͈̅̈͑̔́y̴̩͑̓̅, just a completely n̵̝̥͒ͅo̷̻͓̒ṛ̷͉͓̯͔͉̱̿̆m̶͖̼̲̼̗̻̑̃̂̑̾͝ą̴̢̻̳̋̈́̀̒͘͜l̷̥̳̱͐̀̃͌̈́͒́ elevator.
Here is a video showcasing an example of my elevator.