CS6 How to get 53 different objects to randomly enter an area 5 at a time?

[jkell]

if you copy and paste this code, it will work.

I am handling the balloon animations with enter_frame, so it looks a little jerky-

var balloons:Array = new Array("red2", "re_wo", "red_we", "red_to", "red_su", "red_shi", "red_sa", "red_ru", "red_ri", "red_ra", "red_o", "red_ni", "red_na", "red_mi", "red_ku", "red_ko", "red_i", "red_fu", "purple_yu", "purple_wa", "purple_no", "purple_ne", "purple_mo", "purple_ka", "purple_he", "purple_a", "purple", "orange_yo", "orange_wi", "orange_u", "orange_tsu", "orange_te", "orange-se", "orange_me", "orange_ma", "orange_kyo", "orange_ho", "orange_ha", "orange", "blue_ya", "blue_ta", "blue_so", "blue_ro", "blue_nu", "blue_mu", "blue_ki", "blue_hi", "blue_e", "blue_chi");
var counter:Number = 0;
var moveBalloons:Array = new Array();
var distanceMoved=3;//this is distance all the balloons move 1 is slow and 5 is fast

//this function will move the balloons down
hitBackground.onEnterFrame= function(){
	//this moves the balloons
	for(var i=0;i<moveBalloons.length;i++){
		_root[moveBalloons[i]]._y+=distanceMoved;
	}
//this removes the movieclips when they get to a certain y position
        if(_root[moveBalloons[i]]._y>400){
			//trace('kill this one');
			_root[moveBalloons[i]].removeMovieClip();
		}
}

//this function makes a new balloon every 2.3 seconds
setInterval(makeBalloon,2300);

//this function creates a random balloon
function makeBalloon(){
	randomNum= random(balloons.length);
	newBalloon = balloons[randomNum];
	_root.attachMovie(newBalloon,"object"+counter,_root.getNextHighestDepth(),{_x:60+Math.random()*600,_y:50});
	moveBalloons.push("object"+counter);
	counter++
}
makeBalloon();

/*hitBackground.onEnterFrame = function(){
	
	if ( hitBackground.hitTest(balloons) ){
		balloons._alpha = 100; 
		
	} else {
		balloons_alpha = 0; 
	}
}
*/


/*hitBackground.onPress = function(){
	
	counter = counter + 1;
	
	if (counter > 0){
		var balloonstween1:Tween = new Tween(balloons, "_x", mx.transitions.easing.Regular.easeIn, random(6),  false);
			balloonstween2.onMotionFinished = function(){
				attachMovie(balloons[counter],"object"+counter);
			}
	}
}*/