AS3 Class review

programming flash
1

Hi All

more or less new to this forum and new to AS3.

I started my first class tonight, and had some problems,
but figured all of them out. Everything works like I want.
But as it is my first class I wanted to ask if someone
might point out if I did some basic mistakes, or if there
are places for improvement.

Thank you for your time it is highly appreciated.
C:-) H.2.O

[AS]
package {

import flash.display.MovieClip;
import flash.display.Sprite;
import flash.display.Graphics;
import flash.events.TimerEvent;
import flash.utils.Timer;

public class MainTest extends Sprite {

	//basic configuration
	var _rows:uint = 10;
	var _cols:uint = 10;
	var _rectwidth:uint = 30;
	var _rectheight:uint = 20;
	var _offsetleft:int = 30;
	var _offsettop:int = 30;
	
	//helperVars
	var _xpoint:uint = 0;
	var _ypoint:uint = 0;
	var _rand:uint;
	var _myTimer:Timer = new Timer(25);
	var _arrCards:Array = new Array();
	
	var cont:MovieClip = new MovieClip;
	var sp:Sprite;
	
	public function MainTest() {
		init();
		_myTimer.addEventListener(TimerEvent.TIMER,onTime);
		_myTimer.start();
	}
	
	private function init():void{
		addChild(cont);
		cont.x = _offsetleft;
		cont.y = _offsettop;
		for(var arr_ = 0; arr_ < _rows * _cols;arr_++){
			_arrCards[arr_] = new Array(arr_%_cols,Math.floor(arr_/_cols));
		}
	}
	
	private function onTime(e:TimerEvent):void{
		_rand = uint(Math.random() * _arrCards.length-1);
		trace(_rand);
		createRect(_rand);
		_arrCards.splice(_rand,1);
		if(_arrCards.length == 0){
			_myTimer.removeEventListener(TimerEvent.TIMER,onTime);
		}
	}
	
	private function createRect(arrIndex:uint):void{
		sp = new Sprite();
		with(sp.graphics){
			lineStyle(1,0xCCCCCC);
			beginFill(0x1188FF);
			drawRect(0,0,_rectwidth,_rectheight);
			endFill();
		};
		sp.x = _arrCards[arrIndex][0] * _rectwidth;
		sp.y = _arrCards[arrIndex][1] * _rectheight;
		sp.name = "card" + (_arrCards[arrIndex][0] * 10 + _arrCards[arrIndex][1]);
		cont.addChild(sp);
	}
}

}
[/AS]