How to make a scrolling headline replace the main headline as it scrolls up

Hi and Happy New Year!

Got stumped on a problem and need some help. Typical Monday :frowning_face:
I’m trying to copy what some sites have where the user scrolls and a headline is replace by another headline being scrolled up. I have a Move interaction on a scrolling dynamic panel, and when the new headline scrolls to a gray box in the background, the text should change on the first headline. Thought I would be easy, but yikes! I have included the file.

test.rp (58.2 KB)

Any help is greatly appreciated.