anchor.diff:    var audit_list = {};
     //list of model objects that have veen converted for paperscript
     var model_list = new Array();
  +  //hash of colors for models
  +  var model_colors = {};
  +  var model_colors_size = 0;
  +  var available_colors = ["green", "blue", "red", "teal", "orange", "purple"];
   
     function find_or_create_model(new_model)  {
       for(var i = 0; i < model_list.length; i++)  {
  
positive.code:   var Model = Base.extend({
      model_id: 0,
      model_type: "",
      initialize: function(model_obj, position, max_speed, max_force)  {
        this.model_id = model_obj.id;
        this.model_type = model_obj.model;
        
  
negative.code:         return model_list[i]
        }
      }
      //optional code to set the color of the models
      //feels like it needs a rewrite
      model_type = new_model.model
      if(!(model_type in model_colors))  {
        model_colors[model_type] = available_colors[(model_colors_size % available_colors.length)];
        model_colors_size++;
      }
      //finish setting code color
      model = new Model(new_model, Point.random() * view.size, 1, 0.5, model_colors[model_type]);
      model_list.push(model);
      return model;
    }
  