How do I make the Frame GUI to switch different colors randomly like fast?

    local bloxyColaId = 372051683 -- Put the "ID" of you're "Item" that you want to sell. 
    local player = game.Players.LocalPlayer

    function onClick() 
    Game:GetService("MarketplaceService"):PromptPurchase(player, bloxyColaId) 
    end

    script.Parent.MouseButton1Click:connect(onClick)
end


while true do
    wait(.1)
    script.Parent.BorderColor3 = Color3.new(85, 0, 127)
    wait(.1)
    script.Parent.BorderColor3 = Color3.new(0, 85, 255)
    wait(.1)
    script.Parent.BorderColor3 = Color3.new(0, 170, 0)
    wait(.1)
    script.Parent.BorderColor3 = Color3.new(255, 255, 0)
    wait(.1)
    script.Parent.BorderColor3 = Color3.new(255, 85, 0)
    wait(.1)
    script.Parent.BorderColor3 = Color3.new(255, 0, 0)
end

Is thier anything wrong?

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