Spectating script; no output? Please help.

I have a spectating script I made, but after you click on it it just says "close" but nothing else works? Here's the script:

local camera = game.Workspace.CurrentCamera
local on = false
script.Parent.MouseButton1Down:connect(function()
    if on == false then
        for i,v in pairs(game.Players:GetPlayers()) do
            if v.InGame.Value == true then
                camera.CameraType = "Attach" 
                camera.CameraSubject = v.Character.Head
                script.Parent.Text = "Close"
                game.Players.LocalPlayer.PlayerGui.timer.Frame.Visible = false
                game.Players.LocalPlayer.PlayerGui.tp.TextButton.Visible = false
                game.Players.LocalPlayer.PlayerGui.spect.Frame.Visible = true
                on = true
            end
        end
    end

    if on == true then
        game.Players.LocalPlayer.PlayerGui.timer.Frame.Visible = true
        game.Players.LocalPlayer.PlayerGui.tp.TextButton.Visible = true
        game.Players.LocalPlayer.PlayerGui.spect.Frame.Visible = false
        camera.CameraType = "Custom"
        camera.CameraSubject = game.Players.LocalPlayer.Character.Humanoid
    end
end)