Whats the best way to swap sticky vector on scroll in wix studio?

Question:
whats the best way to swap sticky vector on scroll?

Product:
wix studio

What are you trying to achieve:
I want the text and the rest of the page to stay fixed in place while scrolling, and only the vector image changes — vector swap to happen only while the vector image is between 30% and 70% from the bottom of the viewport — until 4 total vectors swap one after another, user scroll to next section. no code version

Additional information: