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There is no need to be more clear. Your point was made clear in the first post. I (and others) fully understand what you are trying to accomplish. However no one is going to do it for you.

I think...

The obj2 must get closer to the obj1 as time passes.

In your words I assume.

Lets think about this. Obj2 must get closer to Obj1. .... 2 must get closer to 1.... (1 and 2 for short)

The...

It is not time to write code yet. Right now it is time to develop a process by which you can solve the problem. Once you have a process that solves the problem you write code to perform the process....

That is indeed the question. What logic will you use? What would be the first step?

You said obj2 starts at 0,0 .... where is obj1 at that time?
So you will need to be able to get the location of...