Header Logo

I would like to add a logo I made to the header. I saved it as a .gif and placed it into the themes images folder already located here: /public_html/wordpress/wp-content/themes/bluezinfandel/images/logo.gif

I am using the Blue Zinfandel theme which can be seen here: https://www.loveforbiz.com

Sorry, I know this has been asked a lot but I tried following some of the instructions in the search topics with no luck. Thanks.