anchor.diff:          audit_list.push(new_audit);
         }
       }
  +    for(var i = 0; i < model_list.length; i++)  {
  +      model_list[i].run(model_list);
  +    }
     }
   
     function onMouseDown(event)  {
  
positive.code:         return model_list[i]
        }
      }
      model = new Model(new_model);
      model_list.push(model);
      return model;
    }
  
negative.code:       this.connection.add(start_point);
        this.connection.add(end_point);
      },
      update: function(caller, new_pos)  {
        if(caller == this.start)  {
          this.connection.segments[0].point.x = new_pos.x;
          this.connection.segments[0].point.y = new_pos.y;
        } else  {
          this.connection.segments[1].point.x = new_pos.x;
          this.connection.segments[1].point.y = new_pos.y;
        }
      },
      get_other_model: function(model)  {
        if(model == this.start)  {
          return this.end
        } else {
          return this.start
        }
      },
    });
  
    //stores a model that isn't an audit and links it to the audits
    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;
        
        var strength = Math.random() * 0.5;
        this.acceleration = new Point(0, 0);
        this.velocity = new Point(Math.random() * 2 - 1, Math.random() * 2 - 1);
        this.loc = position.clone();
        this.radius = 30;
        this.max_speed = max_speed + strength;
        this.max_force = max_force + strength;
  
        this.shape = new Path.Circle(this.loc, this.radius);
        this.shape.strokeColor = "white";
        this.shape.fillColor = "green";
  
        this.title_text = new PointText(this.loc);
        this.title_text.paragraphStyle.justification = 'center';
        this.title_text.characterStyle.fontSize = 10;
        this.title_text.fillColor = 'white';
        this.title_text.content = this.model_type + ": " + model_obj.name;
  
  