Where to put this block of script so that this slideshow can move automatically?

I asked a question before on how to make the jQuery Blinds slideshow move automatically and somebody answered on this page (the one with 12 votes):

Is there a way to make this slideshow move automatically?

Seems like the code is working for most people but I can't get it to work for me. I used the original demo file and placed the code at the very bottom of jquery.blinds-0.9.js, right after "})(jQuery);" but still the slideshow isn't moving. What am I doing wrong? I checked the class names and they are correct.

This is that block of script:

var SlideChanger = function(seconds_each) {
  var index = -1; 
  // on the first cycle, index will be set to zero below
  var maxindex = ($(".change_link").length) - 1; 
  // how many total slides are there (count the slide buttons)
  var timer = function() { 
  // this is the function returned by SlideChanger
    var logic = function() { 
    // this is an inner function which uses the 
    // enclosed values (index and maxindex) to cycle through the slides
      if (index == maxindex) 
        index = 0; // reset to first slide
      else
        index++; // goto next slide, set index to zero on first cycle
      $('.slides开发者_运维技巧how').blinds_change(index); // this is what changes the slide
      setTimeout(logic, 1000 * seconds_each); 
      // schedule ourself to run in the future
    }
    logic(); // get the ball rolling
  }
  return timer; // give caller the function
}

SlideChanger(5)(); // get the function at five seconds per slide and run it

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Try wrapping the last line SlideChanger(5)(); in a document.ready, like this:

$(function(){SlideChanger(5)();})

Otherwise $(".change_link").length will prob return 0