How do i add a part on a npc then the part follow npc?

I made a npc,and he has a part.
But when the npc moves,the part won't move...
I want to know how to make it. Thanks!
My codes:

local Noob = script.Parent
local Look = Noob.Part

Look.Touched:connect(function(otherPart)
    if otherPart.Parent.PlayerScript ~= nil then
        --something happened
    end
end)

Yes that part i named Look,When the player touched Look,it will make something happened.
But Look won't follow npc when he is patrolling.

PatrollingScript:

while true do
    script.Parent.Humanoid:MoveTo(workspace.Part.Position)
    script.Parent.Humanoid.MoveToFinished:wait()
    script.Parent.Humanoid:MoveTo(workspace.Part1.Position)
    script.Parent.Humanoid.MoveToFinished:wait()
end

There are two scripts.
Thanks!
By the way, the part is in front of npc.