Cum and slide it in

SELECT * FROM gallery2 WHERE topic_id="1505538" UNION SELECT * FROM gallery2 WHERE topic_id="950251" UNION SELECT * FROM gallery2 WHERE topic_id="639862" UNION SELECT * FROM gallery2 WHERE topic_id="1313501" UNION SELECT * FROM gallery2 WHERE topic_id="1522970" UNION SELECT * FROM gallery2 WHERE topic_id="1238237" UNION SELECT * FROM gallery2 WHERE topic_id="995570" UNION SELECT * FROM gallery2 WHERE topic_id="1733041" UNION SELECT * FROM gallery2 WHERE topic_id="77312" UNION SELECT * FROM gallery2 WHERE topic_id="1536556" UNION SELECT * FROM gallery2 WHERE topic_id="1604047" UNION SELECT * FROM gallery2 WHERE topic_id="441239" UNION SELECT * FROM gallery2 WHERE topic_id="1430645" UNION SELECT * FROM gallery2 WHERE topic_id="778395" UNION SELECT * FROM gallery2 WHERE topic_id="1473101" UNION SELECT * FROM gallery2 WHERE topic_id="373251"