Creating a working trafic light

Hi, I’m trying to create a working traffic light in my game. What I want is a traffic light that plays a simple animation (Red light goes on than fades, Yellow Light goes on and fades, Green light goes on and fades) that repeats over and over. I tried animating the “Emit” properties in the object’s materials, But that didn’t work. I don’t want to use real lights because its a four-way intersection, and using that many lights would lag like crazy. Does anybody have a good method of doing this?

You can animate material’s properties (color, intensity, specular color, specular intensity, hardness, emit and alpha) in the most recent version, donwload it from the buildbot:

I do not know why you want to use emit.

You can simply animate the color e.g. from black to red and back to black.