#define grey_width 16
#define grey_height 16
static unsigned char grey_bits[] =
{
    0xaa, 0xaa, 0x55, 0x55, 0xaa, 0xaa, 0x55, 0x55, 0xaa, 0xaa, 0x55, 0x55,
    0xaa, 0xaa, 0x55, 0x55, 0xaa, 0xaa, 0x55, 0x55, 0xaa, 0xaa, 0x55, 0x55,
    0xaa, 0xaa, 0x55, 0x55, 0xaa, 0xaa, 0x55, 0x55
};
