tranportation effect like respawn

hey guys i have a wuestion how do i do somthing like stargate if you know stargate sg1 or other stargate series you know thay go trough the gate now i want to get this effect i have a stargate in the game with a plane object attach to it for the (gate`s Vortex so what i want is simpely walk trough the gate end be respawnd on the other gate in level 2

also i have the transport rings thay do the same thing but i cant get it to work i want to walk in to it and than it must activate its animation Witch is the rings will come up and lets say go down if you know stargate you know what i wanted so does somebody haze a script to do this thanks im new to scripting

Maybe here is your answer:

How to make a portal in Unity 3D