How to create my own result set?

Hi there,
I'm making a really weird stored procedure which makes use of about 5 tables...
and I need to create my own result set based on the computed result of various
FOR loops.

Does anyone knows how can I do that using PL/pgSQL?

I "think" I need to declare a couple of variables that accept APPENDING but I
don't know if that's possible.

Lets say for example:
CREATE OR REPLACE FUNCTION weirdFunction() RETURNS AS $$
DECLARE
column1 ;
column2 ;
BEGIN
--first row
column1.append('something');
column2.append('something');

--second row
column1.append('again');
column2.append('again');

END;
$$ LANGUAGE plpgsql;

So the result of that should be
something something
again again

Is it possible to do something like that?

Tanks in advance
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