Put two invisible helihs or gamelogics at exactly your desired two positions
name them pos_1 and pos_2 respectively.
Put a trigger :
Radius : 0
Activation : Radio Alpha
Present
Repeatedly
in On Act box ,put :if (player distance pos_1 < 5 ) then { player setpos getpos pos_2} else { player setpos getpos pos_1 };
call the radio by pressing 0 - 0 - 1.
You'll be teleported to pos_1 if you are more than 5m from pos_1.Otherwise,you get setposed to pos_2.
Regards,
Haroon1992