what does this mean ?

Four cardinal stones for the winds- North, East, South, West. Earth, Air, Fire, Water. Now according to the directions in the text you linked you have the following diretions,

On the stone in the North carve the sigil of Taurus, on the stone in the south carve the sigil of Leo, on the stone in the East carve the sigil of Aquarius, and on the stone in the West carve the sigil of Scorpio. These are the four fixed signs of the Zodiac referring to the elements of earth, air, fire, and water.

And also the four seasons.

Outside of the four you place seven stones for the seven planets of the ancients used in the western mystery tradition. The text gives you instructions to start in front of the northern cardinal sign and go anti-clockwise (widdershins) placing the planets in the order in the text at equal distances apart. Inscribing the planetary sigil on them.

The question you are asking is quite clearly described in the text you have linked above

me and my friends are trying to do an accurate recreation of a rite in the book