    x = 0;
               y += pixSize;
               r = minr;
               i += regionSize;
               continue;
         } else {
           if (y+pixSize >= maxy) {
             if (pixSize > minPixSize) {
               x = 0;
               y = 0;
               r = minr;
               i = mini;
               pixSize /= 2;
               continue;
             }
             return ({})
           } else {
             var block = mandelBlock(pixSize, x, y, regionSize, r, i);
             for