[Polished] Roblox advanced AI Pathfinding script

--SETTINGS
local showpath = false
local Destination = workspace.Destination-- YOU CAN CHANGE THIS.
--SCRIPT CORE
if Destination==nil then
    error("There is no Destination set for the bot to follow, please check line 3.")
end
local destination = Destination.Position
local pathfindingService = game:GetService("PathfindingService")
local humanoid = script.Parent.Humanoid
humanoid.WalkSpeed = 16
local body = script.Parent:FindFirstChild("HumanoidRootPart") or script.Parent:FindFirstChild("Torso")
local path = pathfindingService:CreatePath()
path:ComputeAsync(body.Position, destination)
local waypoints = path:GetWaypoints()
repeat wait(1) humanoid:MoveTo(Destination.Position) path:ComputeAsync(body.Position, destination) until path.Status == Enum.PathStatus.Success
local waypoints = path:GetWaypoints()
for i = 1,#waypoints do
    if showpath == true then
        local part = Instance.new("Part",workspace)
        part.Name = i
        part.Anchored = true
        part.Position = waypoints[i].Position
        part.CanCollide = false
        part.Size = Vector3.new(1.5,1.5,1.5)
        part.Transparency = 1
        if i ~=1 then
            other = workspace:FindFirstChild(tostring(i-1))
            if other~=nil then
                local mag = (other.Position-part.Position).Magnitude
                local trail = Instance.new("Part",workspace)
                trail.Name = "trail"..i
                trail.Size = Vector3.new(0.5,0.5,mag)
                trail.CFrame = CFrame.new(other.Position,part.Position)*CFrame.new(0,0,-mag/2)
                trail.Anchored = true
                trail.CanCollide = false
            end
        end
    end
end
for k, waypoint in pairs(waypoints) do
    if path.Status == Enum.PathStatus.Success then
        humanoid.WalkToPoint = waypoint.Position
        if waypoint.Action == Enum.PathWaypointAction.Jump then
            humanoid.WalkSpeed = 0
            wait(0.3)
            humanoid.WalkSpeed = 16
            humanoid.Jump = true
        end
        humanoid.MoveToFinished:Wait(2)
    else
        repeat path:ComputeAsync(body.Position,destination) until path.Status == Enum.PathStatus.Success
    end
end