$('.model').each(function(model) {
        var top = Math.round($('#container').height() / 3 +
                             Math.random()*maxHeight*2 - maxHeight);
        var left = Math.round($('#container').width() / 3 +
                              Math.random()*maxWidth*2 - maxWidth);
  
        var movement = {'top': top, 'left': left};
        this.animate(movement, 1000);
      });    
    })
  };