Help for adding more tiles to tile based as3 game

im playing around with this code, http://www.emanueleferonato.com/2008/06/22/step-by-step-as3-translation-of-creation-of-a-platform-game-with-flash-step-15/

right now it is only set up to use one tile from the movieclip platform_tile

how would i make it so i can make an unlimited number of tiles?

from the little as3 knowledge i have, would i make it so you load platform_tile+i (number of tile in movieclip which would equal the number on the array?

this is the map code:


        private function BuildMap(){
            Map_data.Setup();                                                // setup data from extern file
            
            level = Map_data.level1;                                        // get data from extern file
            
            for(var t = 0; t < level.length; t++){
                for(var u = 0; u < level[t].length; u++){
                    if(level[t][u] != 0){                                    //if the data is not null
                        
                    
                    
                        var new_tile:platform_tile = new platform_tile;        //than build a tile
                        
                        addChild(new_tile);                                    //put it on the screen
                        
                        new_tile.gotoAndStop(1);
                        new_tile.x = u * 25;
                        new_tile.y = t * 25;
                        
                        tiles.push(new_tile);                                //put it in an array
                    }
                }
            }
        }
    }
}

thank you
-joey