How to access the class using code on first frame of the layer?

programming flash
1

Hi,

The following class works fine when calling it through document properties panel.

How can I access the same by writing code (to call the class) in first frame of my project?

The following is the Class (Code):

/* Main Class */
/* Developed by Carlos Yanez */
/* Image: http://www.flickr.com/photos/andyarmstrong/89441086/ */

package
{
    import flash.display.MovieClip;
    import flash.events.Event;
    import flash.utils.Timer;
    import flash.events.TimerEvent;
    
    public class Snow extends MovieClip
    {
        private var flakesVector:Vector.<MovieClip> = new Vector.<MovieClip>();
        private var timer:Timer = new Timer(2000);
        
        public function Snow(speed:int = 3, flakesNumber = 150):void
        {
            for(var i:int = 0; i < flakesNumber; i++)
            {
                var flake:Snowflake = new Snowflake();
                
                flake.vel = (Math.random() * speed) + 0.5;
                flake.xSpeed = Math.floor(Math.random() * (0.5 - -0.5 + 1)) + -0.5;
                
                flake.scaleX = (Math.random() * 1) + 0.3;
                flake.scaleY = flake.scaleX;
                flake.x = Math.random() * stage.stageWidth;
                flake.y = Math.random() * stage.stageHeight;
                
                addChild(flake);
                
                flakesVector.push(flake);
            }
            
            addEventListener(Event.ENTER_FRAME, fall);
            timer.addEventListener(TimerEvent.TIMER, changeMovement);
            timer.start();
        }
        
        private function fall(e:Event):void
        {
            for(var i:int = 0; i < flakesVector.length; i++)
            {
                flakesVector*.x += flakesVector*.xSpeed;
                flakesVector*.y += flakesVector*.vel;
                
                if(flakesVector*.y > stage.stageHeight)
                {
                    flakesVector*.x = Math.random() * stage.stageWidth;
                    flakesVector*.y = -flakesVector*.height;
                }
            }
        }
        
        private function changeMovement(e:TimerEvent):void
        {
            for(var i:int = 0; i < flakesVector.length; i++)
            {
                flakesVector*.xSpeed *= -1;
            }
        }
    }
}

Please help.

The following code throws an error:

import Classes.Snow;

var snow:Snow = new Snow();

snow.init(50, 10, 5, 1200, 800, "left");

addChild(snow);

The error is:
1061: Call to a possibly undefined method init through a reference with static type Snow.