Attach movie at certain time interval

[font=verdana, arial, helvetica][size=2]Hello,

I would like to place attach clips to the _root at a certain interval of time (instead of very fast in a loop), but im having some problems planning it out correctly. Could someone give me some direction?

This is what i have as of now…
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[AS]
i = 1;

// Place the clip on the stage later to become a member of the activator class

function placeClip() {

 // Attach the movie clips

 mc = attachMovie('mc', 'mc'+i, this.getNextHighestDepth());

 // Set degree of each clip

 mc._rotation += i*3;

 i++;

}

ID = setInterval(placeClip, 20); [/size][font=verdana, arial, helvetica][size=2]
[/AS]

It is attaching it, but i want it to be more like a fan spanning out then a clock hand ticking. By this I mean, I would like the clips to remain on the stage. In this case, it seems like the clips are getting replaced.[/size][/font][size=2]
[/size] [font=verdana, arial, helvetica][size=2]
Much appreciated![/size][/font]