How can I use ROBLOX's path finding service?

So far, I have not been successful; with finding a up-to date path finding tutorial on YouTube, and the only thing that's close to what I want is a looped MoveToPoint script, which really isn't what I'm looking for. That's what I'm using right now for a project of mine, but I'd like to use pathfinding for it, just to tinker with other things I don't like with the WalkToPoint.

while true do

script.Parent.WalkToPoint = script.Parent.Parent.Parent.PointB.Position
wait(3)
script.Parent.WalkToPoint = script.Parent.Parent.Parent.PointA.Position
wait(3)

end

In a nutshell, basically I want to use pathfinding for a project of mine, tinkering some stuff here and there that I don't like with WalkToPoint.