Requirements:

1. Arduino Uno (or any type of Arduino)
2. 28BYJ-48 Stepper motor
3. ULN2003 driver
4. String
5. Tape

Steps:

Use string and tie it around the stepper motor then place the cap so the string doesnt come off.

2.

Tie string around elevator loop.

3.

Wire up as so.

4. After upload the code that I have provided and it should work!

Hope you like it.

It's not the fastest because of the motor it uses but it makes for a great display!