#define expand_width 16
#define expand_height 16
static char expand_bits[] = {
   0x00, 0x00, 0x00, 0x00, 0x04, 0x40, 0x0c, 0x60, 0x1c, 0x70, 0x3c, 0x78,
   0x7c, 0x7c, 0xfc, 0x7e, 0xfc, 0x7e, 0x7c, 0x7c, 0x3c, 0x78, 0x1c, 0x70,
   0x0c, 0x60, 0x04, 0x40, 0x00, 0x00, 0x00, 0x00};