I didn't noticed that he wants it animated, but neither Carking replied to that...Just so you don't know, he also wants the light to rotate around.
Make it animate is impegnative, you need to make copies of the object with the light projection texture and rotate them; isn't easy to explain, take as example the wipers animation of some buses. Then you have to set the textures to make the animation and decide teh frame number.
This same operation must be done for any "objects" animation, because MM2 has objects animations only for the bascule bridges (it can be done with any object).