Please help me edit this code!!

First off…I’m a complete 100% newbie to this so please excuse my lack of knowledge. I got the white screen of death a couple of days ago while trying to follow a youtube video on how to edit the footer. I had to uninstall and reinstall a fresh copy of wordpress and reinstalled my theme. I don’t want to mess up this time so I’d love if someone experienced could please tell me exactly how to edit my code so I won’t get an error this time.

My website is https://www.globalpushmarketing.com

I am trying to get the footer to only show the copyright sign “2013 Global Push Marketing” without showing D5 Business Line Theme by: D5 Creation Powered by WordPress

Apparently I need to edit the code in the funtions because it isn’t anywhere in my footer.php code.

Here is the area I THINK im supposed to edit. Please Help!!

// D5 BusinessLine and WordPress Credit

function d5businessline_credit() {

echo ‘ | D5 Business Line Theme by: <img width=”30px” src=”‘ . get_template_directory_uri() . ‘/images/d5logofooter.png” /> D5 Creation | Powered by: WordPress‘;

}