The 6 squares that are inscribed in a (generic) quadrangle. Points A,B,C,D (the vertices of the quadrangle) are the masters of the scheme. Changing the place of these points modifies the quadrangle ABCD and consequently the location of the inscribed squares.The construction of the scheme is quite complicated (there are lots of hidden objects), involving the pivots (these are the extra points shown in the drawing) of equilateral orthogonal triangles inside a triangle. Besides the scheme-sockets tool is several times applied to save time. The recipe leading to the pivots and the construction of the various squares is studied in section-4 of the file SimilarlyGliding.html .