We want to add blinking lights!

<code>
// ==UserScript==
// @name           Das Blinkenlights
// @namespace      http://www.nycresistor.com
// @include        *
// @description    Adds awesome blinky lights to webpages
// ==/UserScript==


// Add jQuery
var GM_JQ = document.createElement('script');
GM_JQ.src = 'http://jquery.com/src/jquery-latest.js';
GM_JQ.type = 'text/javascript';
document.getElementsByTagName('head')[0].appendChild(GM_JQ);

// Check if jQuery's loaded
function GM_wait() {
    if(typeof unsafeWindow.jQuery == 'undefined') { window.setTimeout(GM_wait,100); }
else { $ = unsafeWindow.jQuery; letsJQuery(); }
}
GM_wait();




// All your GM code must be inside this function
function letsJQuery() {

  $('body').css('background', 'url(http://piratetrain.com/led.gif) repeat');

}

</code>