Hibla is orientated towards the eastern sky. At about 8:30 to 9 in the morning the sun is aligned with the stone. Both sides are illuminated. This form of illumination will only last a few minutes each day and be at the same time. At all other times one or other side will be in shade. With such a stone you have the ability to recognize a cycle in the sky. It is a fixed plane and it is orientated to enable you to see the ecliptic as it entered your horizon.