// midnghthei
// forked from Murai's wonderFl_KeyVisual_v1
// write as3 code here..
package 
{
	
	/**
	 * 
	 * @author Takashi Murai(KAYAC)
	 */
	 
	import flash.display.*
	import flash.events.*
	import flash.text.*
	import flash.filters.*;
	import flash.geom.*;
	import flash.utils.*

[SWF(width="465", height="465", backgroundColor="0xFFFFFF", frameRate="30")]  
	
	public class WonderFL extends MovieClip
	{
		//
		var Layer:Sprite=new Sprite()
		var drawPos:Sprite=new Sprite()
		var textPos:Sprite=new Sprite()
		
		var txtFmt:TextFormat = new TextFormat();
		var textFields:TextField=new TextField()
		
		//message
		var messages=["hello world"]
		
		//lleasures
		var posX:Number = stage.stageWidth / 2;  
		var posY:Number = stage.stageHeight /2;  
				
		function setMessage(mes:String,blend:String,hex:Number){
			txtFmt.font="Arial"
			txtFmt.align = TextFormatAlign.CENTER;
			txtFmt.color=hex
			
			textFields.defaultTextFormat = txtFmt;
			textFields.multiline=true
			textFields.autoSize=TextFieldAutoSize.LEFT
			textFields.x =0
			textFields.y = 0
			textFields.text=mes
			
			
			textPos.alpha=0.5
			textPos.blendMode=blend
			
			textPos.x=stage.stageWidth/2-textFields.width/2
			textPos.y=stage.stageHeight/2-textFields.height/2
		}
	}
}

still "couldn't build" (already added the 2 } i missed)