#define mark_width 16
#define mark_height 16
static char mark_bits[] = {
   0x00, 0x00, 0x00, 0x0c, 0x00, 0x0c, 0xf8, 0x0d, 0xf8, 0x16, 0xf8, 0x16,
   0xf8, 0x16, 0xf8, 0x16, 0x76, 0x1b, 0x6c, 0x1b, 0x58, 0x1b, 0xb0, 0x1b,
   0xe8, 0x1d, 0xc0, 0x01, 0x80, 0x00, 0x00, 0x00};