Here is the code I used to create the widget below:
<br>
<body bgcolor="black">
<title>Is It Friday?</title>
<center>
<font color="white">
<h1>Is It Friday?</h1>
<?php
$d=date("D");
if ($d=="Fri")
echo "<h2>Yes :)</h2>";
else
echo "<h2>No :(</h2>";
?>
</font>
</center>
The widget below is visualized via an Iframe.
To embed this widget go to the following url:
http://www.widgetbox.com/widget/isitfriday