Example

The Ball Class

class Ball extends MovieClip 
{
  var xscale:Number = 100;
  var yscale:Number = 100;
  var x:Number = 100;
  var y:Number = 100;
  .....


  function Ball( swfFileBase, baseDepthLevel )
  {
      _root.createEmptyMovieClip( swfFileBase, baseDepthLevel );
      this.prototype = _root[ swfFileBase ];

      // Load movieClips with a loader.
      var mcl:MovieClipLoader = new MovieClipLoader();
      mcl.loadClip( swfFileBase+".swf", _root[ swfFileBase ] );		
  }
  
  function move()
  {
      // Random momentum move.
      ...
  }
  
  function die()
  {
      this.prototype._visible = false;
  }
}

The FadeBerry Class

class FadeBerry extends Ball
{
  function FadeBerry( swfFileBase, baseDepthLevel )
  {
    super( swfFileBase, baseDepthLevel );
    x = 100;
    y = 300;
    xscale = 250;
    yscale = 250;    
  }

  function die()
  {
    this.prototype._alpha -= 0.25;
  }
}

The DisBerry Class

class DisBerry extends Ball
{
  function DisBerry( swfFileBase, baseDepthLevel )
  {
    super( swfFileBase, baseDepthLevel );
    x = 400;
    y = 400;
    xscale = 250;
    yscale = 250;    
  }

  function die()
  {
    xscale -= 1;
    yscale -= 1;
    if( xscale < 0 ) xscale = 0;
    if( yscale < 0 ) yscale = 0;
  }

}

The Engine Class

class Engine
{
  var world:World = null;
  var ball:Ball = null;
  var disBerry:DisBerry = null;
  var fadeBerry:FadeBerry = null;
  var time:Number = 0;
  
  function Engine()
  {
    world = new World( "World_blank", 100 )
    ball = new Ball( "ball", 1000 );
    disBerry = new DisBerry( "disBerry", 1010 );
    fadeBerry = new FadeBerry( "fadeBerry", 1020 );
    // Start loop.
    time = 0;
    // Time in milisec.
    setInterval( this, "updateLoop", 20 );
  }

  function updateLoop()
  {  
    time ++;
    if( time <= 200 ) {  
      world.drawTimeBar( time / 2 );
    } else {
      ball.die(); 
      disBerry.die();
      fadeBerry.die();
    }    
    // Move objects.
    ball.move();
    disBerry.move();
    fadeBerry.move();
    // Show.
    updateAfterEvent();  
    
  }
}

The World Class

class World extends MovieClip 
{
  function World( swf_file, baseDepthLevel )
  {

    _root.createEmptyMovieClip( swf_file, baseDepthLevel );
    this.prototype = _root[ swf_file ];
    var mcl = new MovieClipLoader();
    mcl.loadClip( swf_file+".swf", _root[ swf_file ] );    
    // Display time and score.
    _root.createEmptyMovieClip( "inGameDisplay", baseDepthLevel+ 200 );
  }

  function drawTimeBar( percentLeft:Number )
  {
    //trace("percentLeft:"+percentLeft);
    // World size is 130x40.
    _root["inGameDisplay"].clear();
    //
    // Time line.
    _root["inGameDisplay"].lineStyle( 20, 0xcc0000, 15 );
    _root["inGameDisplay"].moveTo( 680, 500);
    _root["inGameDisplay"].lineTo( 680, 150 ); 
    //
    _root["inGameDisplay"].lineStyle( 20, 0xcc0000, 80 );
    _root["inGameDisplay"].moveTo( 680, 500 );
    _root["inGameDisplay"].lineTo( 680, 500 - 3.5 * percentLeft );    
  }
}