div inside other div, moving down in relation to scroll (React) - html

Question

I want to have an object falling from the sky while scrolling down the page. The idea is: You have the object div not moving. It should be in the center of the page (50 px from the top of its parent) and when you scroll down it should scroll down too.
Whats the catch? The object is in another div. I only want the object to be visible inside this div. So not on the entire website.
What have I tried?
1: Fixed positioning, but then it shows up on the entire page, z-index does not work with fixed.
2: Relative positioning on the parent and absolute on the child but then the object div does not go down the page when I scroll.
Visual representation::
On scroll down:
React Component:
<div className="container">
<div className="container--object">
<img src={object}/>
</div>
</div>
CSS
.container {
min-height: 100vh;
position: relative;
}
.container--object {
position: absolute;
top: 50px;
}
My parent component is the homepage. And the siblings of this react component are other div's. The functionality to make the div move down the page is what I am struggling with, how can I move the object div down? Is there a way to base it off the top of the browser?

Answer 1

Ok if i understood correctly, you want something like this? I used an image and some test text
.container {
min-height: 100vh;
height: 2500px;
position: relative;
}
.container_object {
position: fixed;
top: 50px;
}
<div class="container">
<div class="container_object">
<img src="https://images.pexels.com/photos/414612/pexels-photo-414612.jpeg?auto=compress&cs=tinysrgb&dpr=1&w=500" />
</div>
<div style="position: absolute; top:500px">
TEEEEEEEEEEEEST 111111111
</div>
<div style="position: absolute; top:800px">
TEEEEEEEEEEEEST 222222222
</div>
</div>
You should see this snippet in full page