2d bin packing problem

Hello. I found a script https://codeincomplete.com/posts/bin-packing/ for 2d bin packing.I would like to use it in the illustrator It starts correctly. Retrieves the size of the graphic from each layer and adds a new object to the array. However, when the figures (squares) are different sizes, the sort looks ugly

and when all rect are same size

I dont know what im doing wrong. Meaby i should rotare all object to vertical? I dont know. Can somone help or give any tips advice.

Thanks

Packer = function(w, h) {
  this.init(w, h);
};
Packer.prototype = {
  init: function(w, h) {
    this.root = { x: 0, y: 0, w: w, h: h };
  },
  fit: function(blocks) {
    var n, node, block;
    for (n = 0; n < blocks.length; n++) {
      block = blocks;
      if (node = this.findNode(this.root, block.w, block.h))
        block.fit = this.splitNode(node, block.w, block.h);
    }
  },
  findNode: function(root, w, h) {
    if (root.used)
      return this.findNode(root.right, w, h) || this.findNode(root.down, w, h);
    else if ((w <= root.w) && (h <= root.h))
      return root;
    else
      return null;
  },
  splitNode: function(node, w, h) {
    node.used = true;
    node.down  = { x: node.x,     y: node.y + h, w: node.w,     h: node.h - h };
    node.right = { x: node.x + w, y: node.y,     w: node.w - w, h: h          };
    return node;
  }
}
////////USAGE
   var doc = app.activeDocument;
   var myLayers = doc.layers; 
  var packer = new Packer(14000, 15000); 
  var blocks = [];
  
  for( var i=0;i<myLayers.length;i++){
           
      myLayers.hasSelectedArtwork = true;
     
     
       var sel =  doc.selection[0];  
        $.writeln(sel.height);
    
var obj = { w: sel.width, h: sel.height ,objSel:sel, name: myLayers.name};
    blocks.push(obj);
   
            myLayers.hasSelectedArtwork = false;
}
 blocks.sort(function(a,b) { return (b.h < a.h); }); // sort inputs for best results
  packer.fit(blocks);
  for(var n = 0 ; n < blocks.length ; n++) {
       
    var block = blocks;
    if (block.fit) {
      $.writeln(block.fit.x+"-------"+ block.fit.y+"--------------"+ block.w+"------------"+block.h+block.name);
     block.objSel.position=[block.fit.x,block.fit.y];
     }
  }