You'll need to attach a papyrus script for that. Take a look at the tutorials on the basic structure and syntax of Papyrus. When you have, you'll need an event (depending on the trap, OnActivate, OnTriggerEnter, something like that), you'll want a conditional check for the player, probably http://www.creationkit.com/Apply_-_ImageSpaceModifier, http://www.creationkit.com/MoveTo_-_ObjectReference to a marker, and then http://www.creationkit.com/Remove_-_ImageSpaceModifier.
It sounds a lot, but it's quite a simple script. But you'll have to make sure that you understand papyrus first.