#define grid16_width 16
#define grid16_height 16
static char grid16_bits[] = {
   0x55, 0x55, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
   0x01, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
   0x01, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00};