How can i add spread to this ray casting weapon?

I can't find out how to add spread to this weapon. I searched around this forum, and i saw this post. https://scriptinghelpers.org/questions/83500/how-would-i-add-spread-to-a-raycasting-gun

I tried adding the answer to my current gun, but i can't find a way to use it in my gun.

My script(any parts in comments are not set up!):

local tool = script.Parent
local player = game.Players.LocalPlayer
local mouse = player:GetMouse()
local hole = tool.Hole
local flashgui = tool.Hole.Flash
local range = tool.Configs.Range
local equipped = false
local reloading = false






tool.Equipped:Connect(function()


    mouse.Button1Down:Connect(function()
        if not reloading then
            -- if tool.Remotes.CanShoot:InvokeServer() then not set up
                local ray = Ray.new(hole.CFrame.p, (mouse.hit.p - hole.CFrame.p).unit * range.Value)
                local touch, position = workspace:FindPartOnRay(ray, player.Character, false, true)


                local trace = Instance.new("Part")
                trace.Anchored = trace
                trace.CanCollide = false
                trace.Transparency = 0.5
                trace.BrickColor = BrickColor.new("Black")
                trace.Material = Enum.Material.SmoothPlastic

                local distance = (hole.CFrame.p - position).magnitude
                trace.Size = Vector3.new(0, 0, distance)
                trace.CFrame = CFrame.new(hole.CFrame.p, position) * CFrame.new(0, 0, -distance/2)
                trace.Parent = workspace

                game:GetService("Debris"):AddItem(trace, 0.1)

                flashgui.Enabled = true

                wait(0.1)
                flashgui.Enabled = false
            -- end not set up
        end
    end)
end)

Thanks in advance!