#define stepI_width 16
#define stepI_height 16
static char stepI_bits[] = {
   0x01, 0x80, 0x02, 0x40, 0x05, 0xa0, 0x0a, 0x50, 0x15, 0xa8, 0x2a, 0x54,
   0x55, 0xaa, 0xaa, 0x55, 0x55, 0xaa, 0x2a, 0x54, 0x15, 0xa8, 0x0a, 0x50,
   0x05, 0xa0, 0x02, 0x40, 0x01, 0x80, 0x00, 0x00};
