Dynamic instantiation that doesn't appear on stage

Question

import flash.events.*;
var cloudInstance:Cloud = new Cloud;
this.cloudInstance.x = this.hero.x;
this.cloudInstance.y = this.hero.y;
this.hero.visible = false;
this.cloudInstance.addEventListener(Event.ENTER_FRAME, handler);
function handler (e:Event) {
if (this.cloudInstance.currentFrame == 21) {
this.hero.visible = true;
I instantiate my Cloud class that has that name from the library and exported for AS.
I give it the x and y positions of another mc

Answer 1

to scale without distortion, determine the aspect ratio of your cloud:
var aspectRatio:Number=cloud.width/cloud.height
then scale the cloud's width or height to the player and scale the other dimension using the aspectRatio:
cloud.width = player.width
cloud.height=aspectRatio/cloud.width;
positioning depends on reg point location.
p.s.  please mark helpful/correct answers.