How to make a coin spin(not a 3d mesh)

I have a coin i created in maya that I want to put into unity. I don’t care how i get it in unity, whether it be exporting to fbx from maya, or creating a gif of the coin spinning. But basically, in my 2d inifinite runner i need to have the coin in the game and spinning. How do i do that?

http://docs.unity3d.com/ScriptReference/Transform.Rotate.html