Reflection

Debris=game:GetService("Debris")
function raycast()
    local part = owner.Character.Head
    local visual = Instance.new("Part",owner.Character)
    visual.Name = "Ray"
    visual.Color =Color3.fromRGB(255, 255, 127)
    visual.Material = Enum.Material.Neon
    visual.CanCollide = false
    visual.Anchored = true
    visual.CFrame = part.CFrame
    visual.Size = Vector3.new(.1,.1,.1)

    local currentPos = part.Position
    local currentNormal = part.CFrame.LookVector
    local laserdist = 1000
    local function laser(distance)
        local rayp = RaycastParams.new()
                rayp.FilterDescendantsInstances = {owner.Character}
        rayp.FilterType = Enum.RaycastFilterType.Blacklist
        rayp.IgnoreWater = true
        local direction = currentNormal * (laserdist or  distance)
        local raycastResult = workspace:Raycast(currentPos,direction)
        local Pos
        if raycastResult  then
            Pos = raycastResult.Position
        else
            Pos = currentPos + direction
        end
        local clone = visual:Clone()
        Debris:AddItem(visual,.5)
        clone.Parent = owner.Character
        clone.Size = Vector3.new(.5,.5,(currentPos-Pos).magnitude)
        clone.CFrame = CFrame.new(currentPos:Lerp(Pos, 0.5), Pos)
        Debris:AddItem(clone,.5)
        local oldPos = currentPos
        currentPos = Pos
        if raycastResult then
            local norm = raycastResult.Normal
            local reflect = (currentNormal - (2 * currentNormal:Dot(norm) * norm))
            currentNormal = reflect
            laser(laserdist - (Pos-oldPos).Magnitude)
            return
        end
    end
    laser()
end
function Receive(plr,action,obj)
    if action == "Down" then
        raycast()
    end

end
local E = Instance.new("RemoteEvent",NLS([[local E = script:FindFirstChildWhichIsA("RemoteEvent")
        local Mouse = owner:GetMouse()
        function ButtonDown()
        if Mouse.Target ~= nil then
        E:FireServer("Down",Mouse.Target)
        end
        end
        function ButtonUp()
        E:FireServer("Up")
        end
        Mouse.Button1Down:Connect(ButtonDown)
        Mouse.Button1Up:Connect(ButtonUp)
        ]],owner.PlayerGui))
E.OnServerEvent:Connect(Receive)