Make a proper timed flash of a light

I see a bunch of videos on pulsating and so called flashing, but the one thing they don’t do is flash fast and then wait like 4 seconds and then flash fast again. Like an airplane light. Not pulsating. How do I adjust the material to do what I need? Thanks for any help.

you can use a lookup texture to produce the desired effect.
Just sample the texture at a fixed coordinate and pan it towards x.

Try something like this:

Thanks, I will try both out