@GreenSock Thank you for your answers.
I have two fixed menus on a page, and the top menu should be hidden when you scroll up.
Is it possible to make the position of the bottom fixed menu when scrolling upwards not start from zero, but depend on the height of the top menu and when scrolling upwards both the top and bottom menu will be visible. https://codepen.io/Wikt/pen/dydXamm?editors=1111