Random MovieClips help

How do I continue a smooth fade in each time a random movie clip loads into the ‘cover_mc’?


var covers:Array = new Array("usa","uk","germs");

setInterval(coverchange,4000);

function coverchange(){
    
    var i:Number = Math.floor(Math.random()*3);
    cover_mc.attachMovie(covers*,"newCover",5,{_alpha:0});
    onEnterFrame = function(){
    cover_mc.newCover._alpha +=10;
    }
}

each time the new mc loads in, it obviously wipes out the previous attached movie, creating a moment of blankness …

:king: