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?

http://prntscr.com/a8l69h

Is this script in the LocalScript or ?

local