Roblox beam tool

local tool = Instance.new("Tool")
tool.RequiresHandle = false
tool.Name = "BeamTool"

tool.Activated:Connect(function()
    local mouse = owner:GetMouse()
    local beam = Instance.new("Beam", game.Workspace)
    beam.FaceCamera = true
    beam.Color = ColorSequence.new(Color3.new(1, 0, 0))
    beam.Transparency = NumberSequence.new(0, 1)
    beam.Width0 = 1
    beam.Width1 = 5
    beam.Segments = 10

    local startPos = mouse.Hit.p
    while true do
        local endPos = mouse.Hit.p
        local distance = (startPos - endPos).magnitude
        if distance > 4 then
            beam.Attachment0 = Instance.new("Attachment", game.Workspace.Terrain)
            beam.Attachment0.Position = startPos
            beam.Attachment1 = Instance.new("Attachment", game.Workspace.Terrain)
            beam.Attachment1.Position = endPos
            break
        end
        wait()
    end

    local duration = 1 -- Change the duration as required
    local tweenInfo = TweenInfo.new(duration, Enum.EasingStyle.Linear, Enum.EasingDirection.Out)
    local transparencyGoal = {Transparency = 1}
    local tween = game:GetService("TweenService"):Create(beam, tweenInfo, transparencyGoal)
    tween:Play()
    tween.Completed:Connect(function()
        beam:Destroy()
    end)
end)

tool.Parent = owner.Backpack