How to make a scrolling banner in Wordpress sidebar?

See our technical experts explain on how to make your Wordpress website side banner a scrolling one, following users on their screen in the side even when they scroll down.

I have added a banner of size 300x250 to my WordPress blog. I would want to make it scrolling- the banner keeps scrolling in the sidebar as the customer scrolls down the page. How to do this? Is there any ready plugin available for doing this? I am not very well versed with coding.