Sort of ads? (Aim down sights)

-- Aim down sights script
-- Script by EconomicSerg
-- Level: Easy

local player = game:GetService("Players").LocalPlayer
local mouse = player:GetMouse()
local cam = game.Workspace.CurrentCamera

mouse.Button2Down:Connect(function()
        if cam.FieldOfView == 70 then
            cam.FieldOfView = 35
        else
            cam.FieldOfView = 70
        end
end)