Question about looping a function within a listen

I have the Listen part written, and the other functions written. But what I'm having problems with is constantly calling a function, while having it listen for the next command.

for example:

//Listen code here


if (command == "on"
{
updateParticles; // call particle script
return;
}

So what I would like to do is constantly call particle function, so I have a particle display, and still have it listen, for the off command

Thank you in advance for any pointers and help in this.

not going to write it out but the way i would do it is have the particle code with the loop in another script and use a link message in the listen to start it and stop it. then your listen is free to do its thing but the other script with the particles will take care of looping.

http://secondlife.com/badgeo/wakka.php?wakka=listen

listen(integer chan, string str, key id, string msg)
{
    if(msg == "on") updateParticles();
    else if(msg == "off") llParticleSystem([]);
}

* Now HOW did I accidentally write llUpdateParticles() that first time? I think Ama's script has grown way too much on me.