Why this does not work ??

Hello all, why this does not work ?

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create table original(num int);
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create table copia(num int);
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insert into original(num) values (1);
insert into original(num) values (2);
insert into original(num) values (3);
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create function copiar()
    returns int as '
    declare
        ponteiro int;
    begin
        for ponteiro in select * from original order by num asc loop
            insert into copia(num) values(ponteiro);
        end loop;
        return 1;
    end;
    ' language plpgsql;
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-----------------------------------------
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This are the results
teste=# \i for.sql
CREATE TABLE
CREATE TABLE
INSERT 127676 1
INSERT 127677 1
INSERT 127678 1
CREATE FUNCTION
teste=# select copiar();
WARNING:  plpgsql: ERROR during compile of copiar near line 4
ERROR:  missing .. at end of SQL expression
teste=#