Local Script, Code System

local ui = script.Parent
local frame = ui.Frame

local players = game:GetService("Players")
local player = players.LocalPlayer

local rep = game:GetService("ReplicatedStorage")
local remote = rep:WaitForChild("RedeemCode")

local Redeeming = false

frame.Redeem.MouseButton1Click:Connect(function()
    if Redeeming == false then
        Redeeming = true
        task.delay(1.5,function() -- cooldown to not spam codes
            Redeeming = false
        end)

        local boolean,message = remote:InvokeServer(frame.Box.Text)
        if boolean ~= nil and message ~= nil then
            frame.Box.Text = message
            if boolean == true then
                frame.Redeem.TextColor3 = Color3.fromRGB(0, 255, 0)  -- you can remove this, its just a code indicator
            else
                frame.Redeem.TextColor3 = Color3.fromRGB(255, 0, 0)  -- you can remove this, its just a code indicator
            end

            task.delay(.1,function()
                frame.Redeem.TextColor3 = Color3.fromRGB(255, 255, 255) -- you can remove this, its just a code indicator
            end)
        end
    end
end)