This code is a lightbox, but it's necessary click to show the content, and I need it appearing without click. Automatic. Kind a pop up. 

```js
$(document).ready(function() {
  $('.lightbox').click(function() {
    $('.background, .box').animate({
      'opacity': '.60'
    }, 500, 'linear');
    $('.box').animate({
      'opacity': '1.00'
    }, 500, 'linear');
    $('.background, .box').css('display', 'block');
  });

  $('.close').click(function() {
    $('.background, .box').animate({
      'opacity': '0'
    }, 500, 'linear', function() {
      $('.background, .box').css('display', 'none');
    });;
  });

  $('.background').click(function() {
    $('.background, .box').animate({
      'opacity': '0'
    }, 500, 'linear', function() {
      $('.background, .box').css('display', 'none');
    });;
  });
});

```