1#define gray_width 20
2#define gray_height 20
3#define gray_x_hot -1
4#define gray_y_hot -1
5static char gray_bits[] = {
6   0x55, 0x55, 0x05, 0xaa, 0xaa, 0x0a, 0x55, 0x55, 0x05, 0xaa, 0xaa, 0x0a,
7   0x55, 0x55, 0x05, 0xaa, 0xaa, 0x0a, 0x55, 0x55, 0x05, 0xaa, 0xaa, 0x0a,
8   0x55, 0x55, 0x05, 0xaa, 0xaa, 0x0a, 0x55, 0x55, 0x05, 0xaa, 0xaa, 0x0a,
9   0x55, 0x55, 0x05, 0xaa, 0xaa, 0x0a, 0x55, 0x55, 0x05, 0xaa, 0xaa, 0x0a,
10   0x55, 0x55, 0x05, 0xaa, 0xaa, 0x0a, 0x55, 0x55, 0x05, 0xaa, 0xaa, 0x0a};
11