If you liked the previous post on the fireworks on the blog using a script, you'll probably like it even more this option Emilio has shared with me, because artificial lights are made in Flash so has a more attractive and colorful animation.

You can see the demo in this test blog.

To put it in the blog just enter Layout | Edit HTML and before </ body> paste the following:

<style>
. Pyrotechnic {display: block; z-index: 90; position: absolute; top: 0px; left: 0px; width: 100%; height: 900px;}
. Pyrotechnic object {position: fixed; top: 0px; left: 0px; width: 100%; height: 900px;}
</ Style>
<div class="pirotecnicos">
<object type="application/x-shockwave-flash" wmode="transparent"> data="http://dl.dropbox.com/u/647003/fireworks.swf"
<param name="movie" value="http://dl.dropbox.com/u/647003/fireworks.swf"/>
<param name="wmode" value="transparent"/>
<param name="quality" value="high"/>
</ Object>
</ Div>

Having done this and you can enjoy these fireworks in your blog, but if you're worried about the speed of loading the blog (hope so) then you can host the flash file on your own hosting so that the bandwidth of Dropbox ( where I stayed) was not affected and will not harm the load speed of your blog.
Just download the file you mentioned below, unzip, upload to your server and change the 2 URLs which are green with the URL of the file that you uploaded previously.

How are you lights are a SWF file created in there are not many settings that you can do but no need to do anything because of how well they are made and what it will look gorgeous in your blog.

NOTE: The default lights are displayed over the entire blog, so it is very possible that the links may not be available or that the text can be selected.
One option to solve this problem is to change where it says z-index: 90; by z-index: -10;
This enabled again all links and text selection, but the lights are displayed behind the content so it can not be displayed fully.