This is a really basic mod for a friends server. Not particularly going to be maintaining this too long.
this adds 2 blocks for each minecraft dye
the landing plate acts as the central TP point for that color
the travel plates tp users to the landing plate and save the entry location to the player
if a player has tpd from a travel plate the landing plate will tp the player to that entry plate
Both types of plates rotate the teleporting player to match the destination plates orientation
You can rotate by right clicking with a stick
You can make the plate invisible by right clicking with a glass block