How to change the images with viewcontroller progress?

[sami110107]

Assalamualikum,
This is amazing work. But I want only four image and they change their position based on viewcontroller progress. Example I have a bottomsheet view controller with circular progress bar when user start sliding up then the images over the progress bar change their position.

Here is the video link that i want to create. How to achieve this.
I badly need your help.
May Allah bless you.