#define empty_width 16
#define empty_height 16
static char empty_bits[] = {
   0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x10, 0x00, 0x00,
   0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
   0x10, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
