The stones shows the point on the horizon where the sun rises at the winter blot. The distance between the stones is 11m.
The animation shows the shadow’s passage the day before, exactly on the first possible day of the winter blot, and the day after.
The lower stone has a V-shaped top that can be perceived as a sight. The sun is seen rise from the top of the higher stone’s right edge. Sun’s path matches exactly the earliest possible date for the winter blot, ie a half moon cycle after the winter solstice.
The forest at Hunneberg makes it impossible to see the sunrise at the point marked by the stones.