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!