I am trying to update every current value based on the previous value of another property.
Actually, I need to do the task with dates, but just to keep it simple, I'll explain my problem with simple numbers. I have

1. Start, which is 1.
   
2. Stop, which is already defined
3. End
4. Duration, which is already defined

My goal

• Start = Duration of previous index End of previous index
• End = Start Stop of current value

To illustrate, I added the screenshot of the table, how it should look like.
Desired view

Current View

Code below and

I have forked your sandbox to create a proof-of-concept example: