How to make Frame appear on the screen? ( Visible = false)

Hello, I'm making a game for my friends. I created a TextBox. After entering "roblox" into it and pressing enter, I want frame to appear (Visible = true). The script is as localscript.

That's the script:

local textBox = script.Parent




local secretWord = "roblox"
local colorNormal = Color3.new(1, 1, 1) -- white
local colorWrong = Color3.new(1, 0, 0) -- red
local colorCorrect = Color3.new(0, 1, 0) -- green

-- Initialize the state of the textBox
textBox.ClearTextOnFocus = true
textBox.Text = ""
textBox.Font = Enum.Font.Code
textBox.PlaceholderText = "Put here your word!"
textBox.BackgroundColor3 = colorNormal

local function onFocused()
    textBox.BackgroundColor3 = colorNormal
end

local function onFocusLost(enterPressed, inputObject)
    if enterPressed then
        local guess = textBox.Text
        if guess == secretWord then
            textBox.Text = "1 match was found"
            textBox.BackgroundColor3 = colorCorrect
            game.StarterGui.ScreenGui.Frame.Visible = true
            ----------   I was planning to have the script here.

        else
            textBox.Text = "no result found"
            textBox.BackgroundColor3 = colorWrong
        end
    else
        -- The player stopped editing without pressing Enter
        textBox.Text = ""
        textBox.BackgroundColor3 = colorNormal
    end
end

textBox.FocusLost:Connect(onFocusLost)
textBox.Focused:Connect(onFocused)

i tried 3 hours to do it but failed: /

here is short film: https://streamable.com/5w1p69 Greetings KotyOceloty