can you explain a bit more ? a follow script for what? what this script have to do? if you just want a script that make an other Gameobject follow a first one, put overtime position of your game object in an array, then give to your second game object the position of array[x].

Other possibility is to catch distance beetween your two game object then say to your second, if distance > distance max, move follower in direction to the first one.