Reconstruction of the 2001 Folly Barn formation
1.		Construct an equilateral triangle, pointing downwards.
2.		Construct the inscribed circle of the triangle.
3.		For each of the triangle's angular points, construct a circle with its center at that point, passing through the other angular points.
4.		Draw the three rays from the center of the inscribed circle 2 (the central point of the formation) to the angular points of the triangle.
5.		Construct a circle with its center at the intersection of a ray and the inscribed circle 2, passing through the opposite angular points of the triangle, as shown. Repeat this two more times for the intersections with the other rays.
6.		Construct a circle concentric to a circle 3, tangent to circle 5 (at the far end), as shown. Repeat this two more times for the other circles 3 (and 5).
7.		Construct a circle with its center at the central point of the formation, tangent to circles 6 at the outer sides, as shown.
8.		Construct a circle concentric with a circle 5, tangent to a circle 3 at the near end, as shown. Repeat this two more times for the other circles 5 (and 3).
9.		Circles 2, 3, 5, 6, 7 and 8 together form the ingredients for the reconstruction.
10.		Leaving out all unnecessary parts and making black relevant areas completes the reconstruction of the 2001 Folly Barn formation. Black denotes standing crop.
11.		The final result matches perfectly with the aerial image.

Copyright © 2001, Zef Damen, The Netherlands