Playing around with random placements.

Each small square along the top row contains a single shape, which is rotated by 90 clockwise in each subsequent square. In the following rows, those rotated shapes are placed in an offset, as in
1234
4123
3412
2341
Superimposed on that layer are a sort of random choice of rotated or mirrored shape, not fully random as I did not allow the same shape as on the first layer. the top right and bottom left squares each include a third shape.
In order to bring out or show up the negative soaces, I have not drawn the outside lines of the squares except where the placed shapes combine with the square’s edge.

 Ink on watercolour paper. 10x10cm 

Rotated Subracted Squares

Trying something different here, I have rotated the squares around a central point, a set of six are one way round, the other six are reversed from the outside to the inside.

I really wanted to exploit the colour variations of the overlapping areas, I painted with watercolour using a different colour for each distinct shape, not the individual shapes formed by the overlap. The inside shape in each square is either Indian yellow or magenta, then the remains of each square painted either ultramarine blue or cadmium red. Each overlapped shape is then changed by how many colours are laid over it.

This is a trial so there are numerous mistakes but I like the way it’s going. Next time I shall move the two sets further apart and swap the colours around too.