Trying to rotate something? An old Lua scripter

So, I am someone who scripted Lua in the old days, back when orientation was called rotation, so, when I tried to script something new, it isn't working, there is no error message in the output log. So, here is the script. Please help me figure out why it isn't working.

local function Swing()
    while true do
        for i=-30,-120,-2 do
            script.Parent.Orientation = Vector3.new(0,90,i)
            wait(0.01)
        end
        wait(2)
        for i=-120,-30,2 do
            script.Parent.Orientation = Vector3.new(0,90,i)
            wait(0.01)
        end
        wait(2)
    end
end

wait(2)
Swing()