How to script a NPC to move to part(s)?

I need some help creating script to move to part(s), it'll appreciated. I'll also give you credit in my game's description. This is my script: `local pathfinding = workspace:FindFirstChild("managerpath") local pathfinding_part1 = workspace.managerpath:WaitForChild("D1") local pathfinding_part2 = workspace.managerpath:WaitForChild("D2") local pathfinding_part3 = workspace.managerpath:WaitForChild("D3") local pathfinding_part4 = workspace.managerpath:WaitForChild("D4")

while true do wait() script.Parent.Humanoid.WalkToPart = pathfinding_part1 wait(2) script.Parent.Humanoid.WalkToPart = pathfinding_part2 wait(2) script.Parent.Humanoid.WalkToPart = pathfinding_part3 end`