create or replace package random as
declare v_seed 'float8', v_Multiplier 'float8', v_incriment 'float8'
                language 'plpgsql'
body as '
begin
        v_Multiplier := 22695477;
        v_incriment := 1;
        v_seed := date_part(''epoch'', timestamp ''now'');
        return NULL;
end;
'language 'plpgsql'

... resto f package body ...