How to make a variable scope in Lua

first_player = player_1
first_player = "The Original"
if first_player == player_1
    print(first_player)
    local second_player = player_2
    second_player = "The Next One"
    if second_player == player_2
        print(second_player)
        local third_player == player_3
        third_player = "The Other"
        local fourth_player == player_4
        fourth_player == "The Final"
        end
    print(third_player)
    end
print(fourth_player)
end