Code Clean Up

[AS]
package
{

import flash.display.Sprite;
import flash.display.Graphics;       
import flash.text.TextField;
import flash.text.TextFieldAutoSize;
import flash.text.TextFormat;
import flash.text.TextFormatAlign;
import flash.text.TextFieldType;

import flash.events.TimerEvent;
import flash.events.MouseEvent;
import flash.utils.Timer;



public class TimerTimeline extends Sprite 
{
    
    
    
    private var theTimeline:Timer;
    private var theShowTyping:TextField;
    private var theShowTypeFormat:TextFormat;
    
    
    public function TimerTimeline()
    {
        
       
        theShowTypeFormat = new TextFormat();
        theShowTypeFormat.font = "Arial";
        theShowTypeFormat.color = 0x000000;
        theShowTypeFormat.size = 16;
        theShowTypeFormat.align = TextFormatAlign.CENTER;
        
       
        theShowTyping = new TextField();
        theShowTyping.type = TextFieldType.DYNAMIC; 
        theShowTyping.defaultTextFormat = theShowTypeFormat;
        theShowTyping.autoSize = TextFieldAutoSize.LEFT;
        theShowTyping.text = "H";
             
        this.addChild(theShowTyping);
        
        theTimeline = new Timer(500, 11);
        
        
        theTimeline.addEventListener(TimerEvent.TIMER, doTheAnimation);
        theTimeline.start();
        
       
        var resetButton:Sprite = new Sprite();
        resetButton.graphics.lineStyle(1, 0x000000);
        resetButton.graphics.beginFill(0x000000, .2);
        resetButton.graphics.drawRect(0, 0, 65, 20);
        
        var resetButtonTXT:TextField = new TextField();
        resetButtonTXT.type = TextFieldType.DYNAMIC;
        resetButtonTXT.selectable = false; 
        resetButtonTXT.defaultTextFormat = theShowTypeFormat;
        resetButtonTXT.autoSize = TextFieldAutoSize.LEFT;
        resetButtonTXT.text = "replay";
        
        resetButton.y = 25;
        resetButtonTXT.y = resetButton.height/2 + resetButtonTXT.height/2;
        resetButtonTXT.x = resetButton.width/2 - resetButtonTXT.width/2;
      
        resetButton.buttonMode = true;
        
        resetButton.addEventListener(MouseEvent.CLICK, replayTimerHandler);
        
       
        addChild(resetButtonTXT);
        addChild(resetButton);
        
    }
    
    
   
    
    private function doTheAnimation(event:TimerEvent):void 
    {
        
       
        var currentFrameOn:int = event.target.currentCount;
        switch (currentFrameOn)
        {
            
        case 1:
        theShowTyping.appendText("e");
        break;
        
        case 2:
        theShowTyping.appendText("l");
        break;
        
        case 3:
        theShowTyping.appendText("l");
        break;
        
        case 4:
        theShowTyping.appendText("o");
        break;
        
        case 5:
        theShowTyping.appendText(" ");
        break;
        
        case 6:
        theShowTyping.appendText("W");
        break;
        
        case 7:
        theShowTyping.appendText("o");
        break;
        
        case 8:
        theShowTyping.appendText("r");
        break;
        
        case 9:
        theShowTyping.appendText("l");
        break;
        
        case 10:
        theShowTyping.appendText("d");
        break;
        
        case 11:
        theShowTyping.appendText("!");
        break;
        
        }
        
    }
    
   
     
    private function replayTimerHandler(event:MouseEvent):void 
    {
        
        theTimeline.stop();theShowTyping.text = "H";
        theTimeline.reset();
        theTimeline.start();
    }
    
    
    
}

}

[/AS]

Can someone please, please, tell me what is wrong with the above code.
I use it as a teaching tool so I need to know every possible thing that could
be wrong with it. Please, I need someone who will seriously look at it and
tell me what’s wrong, whether it be a coding best practice issue, a garbage collection
issue, programming or whatever. The code works, but according to one person,
it’s laughable, and I really need to know why. As of now my 8+ years of ActionScript
programming have been laughed at, and I need to know why.

There is really only one person who I trust to give a good answer, he has 6 eyes.
But everyone else please let me know what you think of the above code, good or bad.

Thanks