import flash.events.MouseEvent;
import flash.display.Shape;
submitBtn.addEventListener(MouseEvent.CLICK, makeBubble);
function makeBubble (event:MouseEvent):void
{
    chatBubble.y-= 20;
    bubble.y-= 20;
var username:String;
    username = "Joe";
var chatText:String;

var bubble:TextField = new TextField();

    bubble.x = 170;
    bubble.y = 80;
var chatBubble:MovieClip = new MovieClip;
    chatBubble.graphics.beginFill(0xFFFFFF);
    chatBubble.graphics.drawRect(0,0,200,20);
    chatBubble.graphics.endFill();
    chatBubble.x = 170;
    chatBubble.y = 80;
    bubble.text = (username + ": " + chatText);
    chatText = textBox.text;
    addChild(chatBubble);
    addChild(bubble);
}