"npc that follows you"

-- server script 
local PathfindingService = game:GetService("PathfindingService")
local npc = game.Workspace.NPC
local followDistance = 10

while true do
    local players = game:GetService("Players"):GetPlayers()
    local closestPlayer = nil
    local closestDistance = math.huge

for _, player in ipairs(players) do
        local character = player.Character
        if character then
            local distance = (npc.HumanoidRootPart.Position - character.HumanoidRootPart.Position).magnitude
            if distance < closestDistance then
                closestPlayer = character
                closestDistance = distance
            end
        end
    end

if closestPlayer and closestDistance > followDistance then
        local path = PathfindingService:CreatePath()
        path:ComputeAsync(npc.HumanoidRootPart.Position, closestPlayer.HumanoidRootPart.Position)

for _, waypoint in ipairs(path:GetWaypoints()) do
            npc.Humanoid:MoveTo(waypoint.Position)
            npc.Humanoid.MoveToFinished:Wait()
        end
    else
        npc.Humanoid:MoveTo(npc.HumanoidRootPart.Position)
    end

wait(1)
end