repeating a process! problem!!!

hello guys!!!

I'm kind of new in grasshopper so I would like to ask for some help:

I create polylines from points which are randomly selected from a list (coordinates).

Here's the code:

and here's the cluster that is included inside the code:

I want the process (not the form of the line itself) to be repeated in an automated way without copying again and again manually. The catch is that I want it every time to change the value of the seed for creating different automated coordinates, while it still changes the z coordinates as in the code I created (not randomly changed).

The second thing I want to do is to create numerous polylines without repeating their forms and doing it manually.

Any ideas?

Thanks in advance!!!