Game: Teleporter (Research)

With my idea for a parkour game to have a practice level which has divide sections to  practice certain aspects of the game. As it will allow the player to learn the controls and play around with some of the movement and mechanics. But a problem with this is that when you complete a section how will you get out of the room. So I have come up with an idea to have a teleporter at the end of each section to bring the player back to the main lobby to try out other sections of the level. With this idea I have no idea of how I could make a teleporter so I have found a couple of YouTube tutorials on ways I could make a variety of teleporters from a one way portal to a two way portal. With these teleports look alright to make