Simple AntiLag and Netless script

-- this netless script is not mine it's made by others I don't know how to code netless
for i,v in next, game:GetService("Players").LocalPlayer.Character:GetDescendants() do
if v:IsA("BasePart") and v.Name ~="HumanoidRootPart" then 
game:GetService("RunService").Heartbeat:connect(function()
v.Velocity = Vector3.new(-30,0,0)
end)
end
end

game:GetService("StarterGui"):SetCore("SendNotification", { 
    Title = "Notification";
    Text = "Netless Ran";
    Icon = "rbxthumb://type=Asset&id=5107182114&w=150&h=150"})
Duration = ;

 Terrain = .Terrain
 Lighting = :()

Terrain.WaterWaveSize = 
Terrain.WaterWaveSpeed = 
Terrain.WaterReflectance = 
Terrain.WaterTransparency = 

Lighting.GlobalShadows = 
Lighting.FogEnd =  
Lighting.Brightness =  

 _, child  (:()) 
     child:()  child.Name ~=  
        child.Material = .Material.Plastic
        child.Reflectance = 
     child:()  child:() 
        child:()
     child:()  child:()  child:() 
        child.Enabled = 
     child:() 
        child.Visible =