Korpin

Hello green fellas! What I'm trying to accomplish is I think very simple but I'm still stuck on it. This is what I want when an user scroll : -> while the user is scrolling, the div must appear slowly (with opacity) at the center of the screen -> when opacity is at 1, keep it like that and do nothing for some defined px/vh while keep scrolling -> when those px/vh are ended then change the opacity from 1 to 0 while user keep scrolling -> go to next div/section and do the same So the div must appear on the center of the screen and disapear on the center of the screen. (And I need to do the same with the following div's). Here is a codepen of what I tried. Thanks a lot in advance for your help!