How do i run independent commands on the same defun?

[Hugo Mezarina]

See... I want to run independent commads on the same defun...
I want to write a function to do this:

   copy a region of the current buffer
   generete a new buffer
   paste that region in that new buffer
   sort the fields of the new region

I want to do this inside of the body of a function. I'd like to know if 
there is a function like the one a propose on the next lines:  
eval-next-lines

(defun copy-and-sort-in-newbuff (original-buff field-name)
   (eval-next-lines
        (generate-new-buffer (concat original-buff "-" field-name))
       (set-buffer original-buff)
       (copy-region-as-kill  (point-min) (point-max))
       (set-buffer (concat original-buff "-" field_name))
       (yank)
       (sort-fields -1 (point-min)(point-max))
   )
)

If there is another way to do this... plesase let me know...

I know it is rookie problem...but it is my current state on this field...

I appreciate your help on this!

Thank you.

Hugo