#define expand_width 16
#define expand_height 16
static char expand_bits[] = {
   0x00, 0x00, 0x00, 0x00, 0x40, 0x02, 0x60, 0x06, 0x70, 0x0e, 0x78, 0x1e,
   0x7c, 0x3e, 0x7e, 0x7e, 0x7e, 0x7e, 0x7c, 0x3e, 0x78, 0x1e, 0x70, 0x0e,
   0x60, 0x06, 0x40, 0x02, 0x00, 0x00, 0x00, 0x00};