On a pebbled ground, the number "81" is formed by stones

On a pebbled ground, the number "81" is formed by stones. The "8" is outlined with dark-colored rocks, while the inside of the zeros is filled with smaller, reddish-brown pebbles. The number "1" is made with the same reddish-brown stones. The surrounding area is covered in small, gray pebbles. Some of the stones are positioned like a star at the base of the "1".