How to do this with as low lag as possible

Let's say I've got 7 objects that have to listen for commands from their master.

I can't link them because they are moving objects, when they are linked they won't be moving the right way.

So what I've got now is that every objects has an llListen on channel 1 for everything, then they scan if the commands they need are being said with if statements.

I was wondering if there's another way of talking to each other witch would produse less lag then llListen.
that way I could just make one object listen to it and then tell the other 6 objects what to do..

Further more, I've got something flashing on/off very fast with a timer, is there another way to do that?

I'm sorry for my bad english, it's not my native language

For the flashing thing, you could create a texture that is half clear and half the texture/colour you want, then you llSetTextureAnim to make it flash.

No, that's as lagless as you're going to get.

Well, I'd still need a timer to switch the texture, wouldn't I?

Edit: Sorry, I should read first, ask questions later..