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So the only part of this scripts you want to modify is on line five, the bits after the second plus character, just make sure you don't use quotes between the first quote after the plus character and the last quote before the end of the line.
While there are a few choices here, the best way would be to place them in the adding source to the of your weblog box that you find on the Topic page Optionen > Integrate (named Divi or Extra on your WordPress dashboard). Or you can simply plug this source into a source engine and append it to any page where you want to process the credit of the bottom line.
That would mean that you can change the credit for the page base footing. There are other ways I know that involve putting a copy of the footer.php in your kid's topic and modifying it, but if Elegant Themes updates the footer.php, you won't get these changes unless you upgrade the copy you made in your kid's topic by hand.