Any reason why this doesn't work? No errors get produced, and I'm downright confused.

-- Defining Variables
local Player = game.Players.LocalPlayer
local RunService = game:GetService("RunService")
-- Misc Variables
local Range = 10
-- Script Requirements
local DoorsInRange = {}
local Terrain = workspace.Terrain
local Beam = Instance.new("Beam",Terrain)
local Attachment1 = Instance.new("Attachment",Terrain)
local Attachment2 = Instance.new("Attachment",Terrain)
local HumanoidRootPart = Player.Character.HumanoidRootPart
Beam.Width0 = 0.05
Beam.Width1 = 0.05
Beam.Attachment1 = Attachment1
Beam.Attachment0 = Attachment2
Player.Character.Humanoid.Died:Connect(function(Death)
    Beam:Destroy()
    Attachment1:Destroy()
    Attachment2:Destroy()
    warn("BeamS Restart")
end)
RunService.Heartbeat:Connect(function()
    for i,v in pairs(workspace:GetDescendants()) do
        if v.Name == "DetectionPart" then
            if #DoorsInRange <=1 then
                if table.find(DoorsInRange,v) == nil then
                    table.insert(DoorsInRange,v)
                end
                if table.find(DoorsInRange,v) then
                    local Mag = (v.Position - HumanoidRootPart.Position).Magnitude
                    if (v.Position - HumanoidRootPart.Position).Magnitude <= 10 then
                        Beam.Enabled = true
                        Attachment1.CFrame = HumanoidRootPart.CFrame
                        Attachment2.CFrame = v.CFrame
                    elseif (v.Position - HumanoidRootPart.Position).Magnitude >= 10 then
                        Beam.Enabled = false
                    end
                end
            end
        end
    end
end)