Why does this script freeze the application?

I have this code, and it checks if the person has already unlocked the color. If it's not unlocked, it will work, but if it's already unlocked it will freeze the computer. Any ideas as to why?

I'm also streaming if you guys want to see the context around it. I can also explain it with my voice there.

local color = script.Parent.BackgroundColor3
local brickcolor = BrickColor.new(color)
local brickcolorname = brickcolor.Name
local backpack = game.Players.LocalPlayer.Backpack.Player.ColorValues.ChatColor
local gamepassreq  = script.Parent.Parent.Gamepass
local player = game.Players.LocalPlayer
local passcoderequire = script.Parent.Parent.Parent.Parent.Parent.PasscodeRequire
codestable = _G.codes
unlockedcolors = _G.unlockedcolors


script.Parent.BackgroundColor3 = Color3.new(color.r, color.g, color.b)

function isAuthenticated(player)
    return game:GetService('GamePassService'):PlayerHasPass(player, gamepassreq)
end

script.Parent.MouseButton1Down:connect(function()
                                                                                                print(brickcolorname)
    if script.Parent.Parent.ColorName.Text == 'Twitter Color Pack' or script.Parent.Parent.ColorName.Text == 'Twitch Color Pack' then
        for i = 1, #codestable do
            if tostring(brickcolor) == codestable[i][1] then
                for f = 1, #unlockedcolors do
                    wait()
                    print('Unlocked colors: ' .. unlockedcolors[f])
                    print('CodesTable ' .. codestable[i][1] .. '  ' .. i)
                    print(unlockedcolors[f] == codestable[i][1])
                    if unlockedcolors[f] == codestable[i][1] then
                        print('Through')
                        changething()
                    else
                        passcoderequire.Position = UDim2.new(.5, 0, .5 ,0)
                        passcoderequire.Size = UDim2.new(0, 0, 0 ,0)
                        passcoderequire.Visible = true
                        passcoderequire:TweenSizeAndPosition(UDim2.new(.2, 0, .2, 0), UDim2.new(.4, 0, .4, 0), 'Out', 'Linear', .25)

                        passcoderequire.OK.MouseButton1Down:connect(function()
                            if passcoderequire.A.Text == codestable[i][2] then
                                a = require(game.Players.LocalPlayer.PlayerGui.StartGui.FirstFrame.AwardScript)
                                a(player.Name, brickcolorname)

                                passcoderequire.Position = UDim2.new(.4, 0, .4 ,0)
                                passcoderequire.Size = UDim2.new(0.2, 0, 0.2 ,0)
                                passcoderequire:TweenSizeAndPosition(UDim2.new(0, 0, 0, 0), UDim2.new(.5, 0, .5, 0), 'Out', 'Linear', .25)
                                repeat wait() until passcoderequire.Size.X.Scale <= .05
                                passcoderequire.Visible = false

                                changething()

                                passcoderequire.A.Text = 'Enter code here'
                            else
                                passcoderequire.Incorrect.Visible = true
                                wait(1)
                                passcoderequire.Incorrect.Visible = false
                            end
                    end)
                end
            end

            end
        end
    else
        if isAuthenticated{player} then--checks gamepass
            backpack.Value = brickcolor
            script.Parent.Text = 'X'
        end
    end
end)

game.Players.LocalPlayer.Backpack.Player.ColorValues.ChatColor.Changed:connect(function()
    changething()
end)

function changething()
    backpack.Value = brickcolor
    script.Parent.Text = 'X'
end