UPDATE PartialOverlay2 AS image
SET image ASSIGN < [45:55,25:35] 
 2ul, 2ul, 2ul, 2ul, 2ul, 2ul, 2ul, 2ul, 2ul, 2ul, 2ul;
 2ul, 2ul, 2ul, 2ul, 2ul, 2ul, 2ul, 2ul, 2ul, 2ul, 2ul;
 2ul, 2ul, 2ul, 2ul, 2ul, 2ul, 2ul, 2ul, 2ul, 2ul, 2ul;
 2ul, 2ul, 2ul, 2ul, 2ul, 2ul, 2ul, 2ul, 2ul, 2ul, 2ul;
 2ul, 2ul, 2ul, 2ul, 2ul, 2ul, 2ul, 2ul, 2ul, 2ul, 2ul;
 2ul, 2ul, 2ul, 2ul, 2ul, 2ul, 2ul, 2ul, 2ul, 2ul, 2ul;
 2ul, 2ul, 2ul, 2ul, 2ul, 2ul, 2ul, 2ul, 2ul, 2ul, 2ul;
 2ul, 2ul, 2ul, 2ul, 2ul, 2ul, 2ul, 2ul, 2ul, 2ul, 2ul;
 2ul, 2ul, 2ul, 2ul, 2ul, 2ul, 2ul, 2ul, 2ul, 2ul, 2ul;
 2ul, 2ul, 2ul, 2ul, 2ul, 2ul, 2ul, 2ul, 2ul, 2ul, 2ul;
 2ul, 2ul, 2ul, 2ul, 2ul, 2ul, 2ul, 2ul, 2ul, 2ul, 2ul
 >