Twentythirteen and JavaScript function

I’ve tried everything and looked everywhere but without success. Twentythirteen theme not calling java script… I want to do this http://jsfiddle.net/SYwba/266/
Tried:

<script type="text/javascript">
$(document).mousemove(function(e) {
    $('.logo').offset({
        left: e.pageX,
        top: e.pageY + 140
    });
});
</script>

<script src="<?php bloginfo('template_directory'); ?>/my_script.js"></script>

Please can anyone help me to to put the script in the right place?
Thanks.