#define check_width 15
#define check_height 15
static char check_bits[] = {
   0x00, 0x00, 0x00, 0x20, 0x00, 0x70, 0x00, 0x38, 0x00, 0x38, 0x00, 0x1c,
   0x00, 0x0e, 0x00, 0x0e, 0x00, 0x07, 0x84, 0x03, 0x8e, 0x03, 0xdc, 0x01,
   0xf8, 0x00, 0xf0, 0x00, 0x60, 0x00};
