Script doesn't create part right?

Hello,

I've got this turret script, it works a bit like this: You touch a part, the script creates a beam, and if you touch that beam, you're dead

But the script doesn't create the beam right, so when you are supposed to touch the beam, the script stops.

The output doesn't give any warnings or something

Can someone help me finding the error in this script?

Script:

local gun = workspace.Turret.Gun
local originpoint = gun.CFrame.p
script.Parent.Radar.radar.Touched:connect(function(plr)
	
	
    if plr.Parent:IsA("Model") and plr.Parent:FindFirstChild("Humanoid") and game.Players.LocalPlayer.Character:FindFirstChild("Head") then
    script.Parent.Gun.alert:Play()
    local ignore = {script.Parent,game.Players[plr.Parent.Name]}
    local ray = Ray.new(originpoint,plr.Parent.Head.CFrame.p.Unit*100)
    local gun,position = workspace:FindPartOnRayWithIgnoreList(ray,ignore,false,true)


    local beam = Instance.new ("Part")
    beam.BrickColor = BrickColor.Red()
    beam.Material = "Neon"
    beam.Transparency = 0.5
    beam.Anchored = true
    beam.Locked = true
    beam.CanCollide = false
    beam.Parent = gun

--this is where the script makes the beam, it's broken, but I don't know what


    local Distance = (script.Parent.Gun.CFrame.p-position).magnitude
    local distance = Distance/8
    repeat
        beam.Size = Vector3.new(.15,.15,distance)
        beam.CFrame = CFrame.new(script.Parent.Gun.CFrame.p,position)*CFrame.new(0,0,-distance/2)
        distance = distance*2
        wait (0.01)
    until distance == Distance*2


print ("kimpie paarntie")
    beam.Touched:connect(function(hit) -- this is where the script stops, whats wrong? -- this is where it stops because there is no beam
        if hit.Parent:IsA("Model") and hit.Parent:FindFirstChild("Humanoid") then
            local human = hit.Parent:FindFirstChild("Humanoid")
        human:TakeDamage(10^308)



      

  

    game:GetService("Debris"):AddItem(beam,.1)





end
end)

end
end)

Thanks for your time