real questions here: https://stackoverflow.com/questions/24239897/change-image-on-scroll-position https://stackoverflow.com/questions/24239897/change-image-on..

real questions here: https://stackoverflow.com/questions/24239897/change-image-on-scroll-position https://stackoverflow.com/questions/24239897/change-image-on... , https://www.w3schools.com/howto/howto_css_bg_change_scroll.asp https://www.w3schools.com/howto/howto_css_bg_change_scroll.a... , https://www.geeksforgeeks.org/how-to-change-image-dynamically-when-user-scrolls-using-javascript/ https://www.geeksforgeeks.org/how-to-change-image-dynamicall... , https://codepen.io/fabuchao/pen/xwbRaa https://codepen.io/fabuchao/pen/xwbRaa