How do i create this static scrolling animation css effect? [closed]

I found this awesome effect at https://cuberto.com/ In the featured projects section, when we scroll, there is a smartphone-like object in which different images change with a wavy animation. I was really curious about how to make it. Is it done with static divs? I started web development a few months ago. Thanks in advance! BTW, this is my first time on stack overflow.