local beamEvent = Instance.new("RemoteEvent")
beamEvent.Name = "BeamEvent"
beamEvent.Parent = game.ReplicatedStorage

local function MoveTowards(current, target, maxDistanceDelta)
    local a = target - current
    local magnitude = a.magnitude
    if magnitude <= maxDistanceDelta or magnitude == 0 then
        return target
    end
    return current + a / magnitude * maxDistanceDelta
end

beamEvent.OnServerEvent:connect(function(player, mouseHit, wandEndPoint)
    local beam = Instance.new("Part", workspace)
    beam.BrickColor = script.Color.Value
    beam.FormFactor = "Custom"
    beam.Size = Vector3.new(2, 1, 4)
    beam.Material = "Neon"
    beam.Transparency = 0.11
    beam.Anchored = true
    beam.Locked = true
    beam.CanCollide = false
    beam.Shape = Enum.PartType.Block
    beam.CFrame = CFrame.new(wandEndPoint)

    beam.Touched:connect(function(otherPart)
        -- Beam touched something - make sure it wasn't us
        if player.Character and not otherPart:IsDescendantOf(player.Character) then
            -- Check to see if it was a character
            local humanoid = otherPart.Parent:FindFirstChild("Humanoid")
            if not humanoid then
                humanoid = otherPart.Parent.Parent:FindFirstChild("Humanoid")
            end

            if humanoid then
                -- We hit somebody - add hit code here
                humanoid:TakeDamage(110)
            end
            beam:Destroy()
        end
    end)

    -- Change these to customize the beam movement
    local moveSpeed = 1
    local maxDisplacement = 2
    local oscillationSpeed = 10
    local oscillationAxis = "X" -- Set to "X" or "Y"
    local beamTravelDistance = 150

    local destination = wandEndPoint + (mouseHit - wandEndPoint).unit *
        math.min(beamTravelDistance, (mouseHit - wandEndPoint).magnitude)

    -- Need to manually check for collisions with terrain in between our gun barrel and target point. Terrain dosn't fire Touched event
    local ray = Ray.new(wandEndPoint, (mouseHit - wandEndPoint).unit * beamTravelDistance)
    local part, position = workspace:FindPartOnRay(ray, player.Character, false, true)
    if part and part.Name == "Terrain" then
        if (position - wandEndPoint).magnitude < (destination - wandEndPoint).magnitude then
            -- Hit terrain. Set beam to only travel until it hits blocking terrain
            destination = wandEndPoint + (mouseHit - wandEndPoint).unit * (position - wandEndPoint).magnitude
        end
    end

    local isMoving = true
    local rng = Random.new()
    local beamPos = beam.CFrame.p
    local count = 0

    while isMoving do
        local newPos = MoveTowards(beamPos, destination, moveSpeed)
        if newPos:isClose(destination, 1e-7) then
            isMoving = false
        end
        local center = CFrame.new(newPos, destination)
        beamPos = center.p

        count = count + oscillationSpeed % 360
        local offsetCFrame = center * CFrame.new(oscillationAxis == "X" and math.sin(math.rad(count)) * maxDisplacement or 0,
            oscillationAxis == "Y" and math.sin(math.rad(count)) * maxDisplacement or 0, 0)

        beam.CFrame = offsetCFrame

        wait()
    end

    beam:Destroy()
end)