Left side - Photos, or any other static element.
Right side - Swapping Text, Headline, Button or any other element.
You can clone this project and replace the text elements inside the 'swapping-div' with anything you want.
When your bath soap bar gets too small to use, don't throw it away! open the next bar, and when you finish showering, stick the small old bar to the back of the new bar. Onces they both dry, they will become one.