How can I blink an actor after it's spawned?

You’ll need to give an image of your blueprint or some code example of what you are currently doing?
Sounds like you are looping through a bunch of actors, or you are doing the functionality in one blueprint that is shared with all actors, therefore they will all do the same.

If I use sine and time node, all actors will blink at the time, how can I make them begin to blink after spawning them?