Roblox Script Generated by ScripterAI

"Make a nice and cool looking GUI that is rainbow colored that will greet you when you enter the game called "Colored Cars". Make a "Press anything button" that when you press anything on the keyboard the GUI will close. Make it cover the whole screen"

-- local script (StarterGui) 
local player = game.Players.LocalPlayer
local screenGui = Instance.new("ScreenGui", player.PlayerGui)
screenGui.ResetOnSpawn = false

local background = Instance.new("Frame", screenGui)
background.BackgroundColor3 = Color3.fromRGB(255, 0, 0)
background.BorderColor3 = Color3.fromRGB(255, 255, 255)
background.BorderSizePixel = 5
background.Position = UDim2.new(0, 0, 0, 0)
background.Size = UDim2.new(1, 0, 1, 0)

local rainbowColors = {Color3.fromRGB(255, 0, 0), Color3.fromRGB(255, 127, 0), Color3.fromRGB(255, 255, 0), Color3.fromRGB(0, 255, 0), Color3.fromRGB(0, 0, 255), Color3.fromRGB(75, 0, 130), Color3.fromRGB(148, 0, 211)}
local currentColorIndex = 1

local greetingText = Instance.new("TextLabel", background)
greetingText.Text = "Welcome to Colored Cars!"
greetingText.Font = Enum.Font.SourceSansBold
greetingText.TextSize = 50
greetingText.TextColor3 = rainbowColors[currentColorIndex]
greetingText.Size = UDim2.new(1, 0, 0.5, 0)
greetingText.Position = UDim2.new(0, 0, 0.25, 0)

local pressAnythingText = Instance.new("TextLabel", background)
pressAnythingText.Text = "Press anything to continue..."
pressAnythingText.Font = Enum.Font.SourceSansBold
pressAnythingText.TextSize = 30
pressAnythingText.TextColor3 = rainbowColors[currentColorIndex]
pressAnythingText.Size = UDim2.new(1, 0, 0.1, 0)
pressAnythingText.Position = UDim2.new(0, 0, 0.8, 0)

local pressAnythingButton = Instance.new("TextButton", background)
pressAnythingButton.Text = ""
pressAnythingButton.Size = UDim2.new(1, 0, 1, 0)
pressAnythingButton.Position = UDim2.new(0, 0, 0, 0)
pressAnythingButton.BackgroundColor3 = Color3.fromRGB(0, 0, 0)
pressAnythingButton.BackgroundTransparency = 0.5
pressAnythingButton.AutoButtonColor = false

pressAnythingButton.MouseButton1Down:Connect(function()
    screenGui:Destroy()
end)

local rainbowColorLoop = coroutine.create(function()
    while true do
        currentColorIndex = currentColorIndex % #rainbowColors + 1
        greetingText.TextColor3 = rainbowColors[currentColorIndex]
        pressAnythingText.TextColor3 = rainbowColors[currentColorIndex]
        wait(0.1)
    end
end)

coroutine.resume(rainbowColorLoop)