set value var via execute

Is it possible to set the value of a var via execute?

drop table if exists __test;
create unlogged table __test(
id int
);

DO $$

DECLARE
v_holder int;
v_table text = 'table';
v_record_0 text[];
v_id int;

BEGIN

execute '
insert into __test(id)
select id from '||v_table||' order by random() limit 2
';
v_id = (select id from __test limit 1);

--begin this
fails------------------------------------------------------------------------------------------
v_holder = execute 'select id from '||v_table||' order by random()
limit 1';
--end this
fails-------------------------------------------------------------------------------------------

v_record_0 := array(
SELECT id FROM table order by random() --limit 2
);

raise notice '%', v_record_0;
END;

$$ LANGUAGE plpgsql;