#define corner_width 8
#define corner_height 16
static unsigned char corner_bits[] = {
   0x00, 0x00, 0x1e, 0x0e, 0x06, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
   0x00, 0x00, 0x00, 0x00 };