Is there any way to make an object rotate after a time interval?

Bad question title but here's the question. I have a spinner in my game, I want it to turn 90 degrees, stop, then turn 90 degrees.

Script in spinner:

while true do 
	script.Parent:SetPrimaryPartCFrame(script.Parent:GetPrimaryPartCFrame()*CFrame.fromEulerAnglesXYZ(.0,.04,.0))
	wait()
	end

Link to model: (http://web.roblox.com/library/5809272427/Spinner)

The spinner is currently coded to just spin.