Controlling Duplicated Movies

Say you duplicate a movie clip called circle 5 times.


amount = 5;
while(amount>0){
     i++;
     duplicateMovieClip(_root.circle,"circle"+i,i);
     amount--;
}

Ive done that, and given them all random x and y positions, but say I wanted just one of those instances to have an _alpha of 50. How would I do that?

Ive tried doing stuff like


_root.circle2._alpha = 50;

Thanks…:luigi: