Plugin to create an waiting page until something is done

jquery-loader.js

//  jQuery Plugin - Loader
//
//  Needs:
//   - jQuery(2.1.1)      >> http://code.jquery.com/jquery-2.1.1.js
//   - Centralize         >> https://gist.github.com/klauskpm/fc25fef2b4c94131d854
(function($) {
  /**
   * Plugin to create an waiting page until something is done
   * @param {Object.<array, integer, boolean>} options Object with waiting
   * texts(texts), time span between actions(interval), and the option to
   * kill the loader(kill)
   * @returns {Boolean|jQuery.this}
   */
  $.fn.loader = function(options) {
    var settings = $.extend({
        texts: ['Loading...', 'Waiting for Maya\'s end of the world'],
        interval: 2000,
        kill: false
    }, options),
        $loaderBackground = $('<div class="loader-background"></div>'),
        $loaderText = $('<span class="loader-text"></span>'),
        $loaderHtml = $('<div class="loader"></div>').append($loaderBackground, $loaderText),
        textNumber = 0;
    
    if(settings.kill) {
        $('.loader').remove();
        return false;
    }
    
    $('html body').append($loaderHtml);
    if(settings.texts.length) {
      textNumber = Math.floor(Math.random() * settings.texts.length);
      $('.loader-text').text(settings.texts[textNumber]);
      $('.loader-text').centralize(true);

      if(settings.texts.length>1) {
        setInterval(function(){
          var randomNumber = Math.floor(Math.random() * settings.texts.length);
          
          if(textNumber==randomNumber) {
            if(typeof(settings.texts[textNumber+1])!=='undefined') {
              textNumber++;
            } else {
              textNumber--;
            }
          } else {
            textNumber = randomNumber;
          }

          $('.loader-text').text(settings.texts[textNumber]);
        }, settings.interval);
      }
    } else {
      console.error('There is no loader text');
    }
    
    return this;
  };
})(jQuery);

loader.css

/** Loader **/
.loader {
    position: fixed;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    z-index: 10;
}

.loader-background {
    background: black;
    width: 100%;
    height: 100%;
    position: fixed;
    top: 0;
    left: 0;
    opacity: 0.8;
    filter: alpha(opacity=80);
    cursor: pointer;
    z-index: 12;
}

.loader-text {
    cursor: default;
    color: white;
    text-align: center;
    position: fixed;
    width: 100%;
    font-size: 28px;
    font-weight: 400;
    z-index: 14;
}

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