How to fix one background at the level of another bg?

Question

css

Hello guys! Help plz, there are two bg - when the first one is filled with content (goes down) and the other, respectively, remains in place, how to make the first one drive up after the first one? So as not to add height to the second one all the time.

Answer 1

Hang both backgrounds on the same block via
background: background1, background2;

Answer 2

fetis26 :