Go here:
http://www.distickers.com/ticker/main.php
On the left hand side select vacation countdown.
Go through the steps to select what your ticker will look like.
On the final page you will click on create ticker.
You will see what our ticker will look like. If you're happy with it, copy the text that's in the second box labeled as
PseudoHTML, UBBCode™ or BBCode
Come back to the DIS, hover your mouse over your screen name in the upper right corner and select Signature
In your Signature, paste the text you copied from the website