UPDATE PartialOverlay1 AS image
SET image ASSIGN < [90:100,90:100] 
 1ul, 1ul, 1ul, 1ul, 1ul, 1ul, 1ul, 1ul, 1ul, 1ul, 1ul;
 1ul, 1ul, 1ul, 1ul, 1ul, 1ul, 1ul, 1ul, 1ul, 1ul, 1ul;
 1ul, 1ul, 1ul, 1ul, 1ul, 1ul, 1ul, 1ul, 1ul, 1ul, 1ul;
 1ul, 1ul, 1ul, 1ul, 1ul, 1ul, 1ul, 1ul, 1ul, 1ul, 1ul;
 1ul, 1ul, 1ul, 1ul, 1ul, 1ul, 1ul, 1ul, 1ul, 1ul, 1ul;
 1ul, 1ul, 1ul, 1ul, 1ul, 1ul, 1ul, 1ul, 1ul, 1ul, 1ul;
 1ul, 1ul, 1ul, 1ul, 1ul, 1ul, 1ul, 1ul, 1ul, 1ul, 1ul;
 1ul, 1ul, 1ul, 1ul, 1ul, 1ul, 1ul, 1ul, 1ul, 1ul, 1ul;
 1ul, 1ul, 1ul, 1ul, 1ul, 1ul, 1ul, 1ul, 1ul, 1ul, 1ul;
 1ul, 1ul, 1ul, 1ul, 1ul, 1ul, 1ul, 1ul, 1ul, 1ul, 1ul;
 1ul, 1ul, 1ul, 1ul, 1ul, 1ul, 1ul, 1ul, 1ul, 1ul, 1ul
 >