This is a script for an elevator that moves along a track. I've tested it mainly in sideview, but it may work in top down screens as well for something like the Somaria platforms in Turtle Rock in ALttP.

Firstly you'll want to set all the constants at the top of the script for your quest.

Place down the tracks for your elevator with the combo flags CF_ELEVATOR for most of the track and CF_ELEVATORSTOP for places you can get off at. Place the elevator FFC on top of a CF_ELEVATORSTOP combo. If you're using a bigger than 1x1 elevator like I am in the example quest, set D0 and D1 to the X and Y offsets for the 1x1 hitbox for the elevator. You want this hitbox to be overlapping the CF_ELEVATORSTOP combo.

If there's no CF_ELEVATORSTOP on the screen, put down an invisible elevator FFC with D2 set to what its combo should be. You need a copy of this script on every screen an elevator can pass through even if there's not one there.

The FFC itself does not actually have a solid bottom (solid FFCs have a history of being buggy), so be sure you put safety platforms underneath your elevators.

This script uses std.zh and ffcscript.zh (purely for the FFCS_INVISIBLE_COMBO constant).