"npc that follows me with roblox walk animations"

-- server script 
local PathfindingService = game:GetService("PathfindingService")
local NPC = game.Workspace.NPC
local animation = Instance.new("Animation")
animation.AnimationId = "rbxassetid://507770453" -- Roblox walk animation ID
local animator = NPC.Humanoid:LoadAnimation(animation)

local function followPlayer(player)
    local path = PathfindingService:CreatePath()
    local target = player.Character.HumanoidRootPart.Position
    path:ComputeAsync(NPC.HumanoidRootPart.Position, target)
    
    for _, waypoint in ipairs(path:GetWaypoints()) do
        NPC.Humanoid:MoveTo(waypoint.Position)
        if waypoint.Action == Enum.PathWaypointAction.Jump then
            NPC.Humanoid.Jump = true
        end
        NPC.Humanoid.MoveToFinished:Wait()
    end
end

game.Players.PlayerAdded:Connect(function(player)
    player.CharacterAdded:Connect(function()
        while true do
            followPlayer(player)
            wait(1)
        end
    end)
end)

NPC.Humanoid.Running:Connect(function(speed)
    if speed > 0 then
        animator:Play()
    else
        animator:Stop()
    end
end)