raycast gun script

local TweenService = game:GetService("TweenService")
local Debris = game:GetService("Debris")

local Tool:Tool = script.Parent
local Handle = Tool:FindFirstChild("Handle")
local ShootPart = Handle:FindFirstChild("Attachment")
local RemoteEvent = Tool:FindFirstChild("RemoteEvent")
local OnCooldown = false

local Do = {
    Damage = 30;
    Cooldown = 0.5;
    Visualize = true;
    ShootSound = "rbxassetid://5238024665";
}

RemoteEvent.OnServerEvent:Connect(function(Player,Received)
    if not OnCooldown then
        OnCooldown = true
        task.delay(Do.Cooldown,function()
            OnCooldown = false
        end)

        local Origin = ShootPart.WorldPosition
        local Direction = (Received.Position-Origin).Unit*3000
        local Raycast = workspace:Raycast(Origin,Direction)

        local Intersection = Raycast and Raycast.Position or Origin + Direction
        local Distance = (Origin - Intersection).Magnitude

        local Visualizer = Instance.new("Part")
        Visualizer.CanTouch = false
        Visualizer.CanCollide = false
        Visualizer.CanQuery = false
        Visualizer.CastShadow = false
        Visualizer.Anchored = true
        Visualizer.Material = Enum.Material.Neon
        Visualizer.Color = Color3.fromRGB(255, 255, 0)
        Visualizer.Size = Vector3.new(.15,.15,Distance)
        Visualizer.CFrame = CFrame.new(Origin, Intersection)*CFrame.new(0,0,-Distance/2)

        if Do.Visualize == true then
            Visualizer.Parent = workspace
            TweenService:Create(Visualizer,TweenInfo.new(.3),{Transparency = 1, Size = Vector3.new(0,0,Distance)}):Play()
            Debris:AddItem(Visualizer,.35)
        end

        if (Do.ShootSound ~= "" or Do.ShootSound ~= nil) then
            local Sound = Instance.new("Sound")
            Sound.SoundId = Do.ShootSound
            Sound.Volume = .65
            Sound.PlayOnRemove = true
            Sound.Parent = Handle
            Sound:Destroy()
        end

        if Raycast then
            local Hit:Part = Raycast.Instance
            local Humanoid = (Hit.Parent:FindFirstChildOfClass("Humanoid") or Hit.Parent.Parent:FindFirstChildOfClass("Humanoid"))

            if Humanoid and Humanoid.Parent ~= Player.Character then
                Humanoid:TakeDamage(Do.Damage)
            end
        end
    end
end)