#define grid_diag8_width 16
#define grid_diag8_height 16
static char grid_diag8_bits[] = {
   0xef, 0xef, 0xd7, 0xd7, 0xbb, 0xbb, 0x7d, 0x7d, 0xfe, 0xfe, 0x7d, 0x7d,
   0xbb, 0xbb, 0xd7, 0xd7, 0xef, 0xef, 0xd7, 0xd7, 0xbb, 0xbb, 0x7d, 0x7d,
   0xfe, 0xfe, 0x7d, 0x7d, 0xbb, 0xbb, 0xd7, 0xd7};