#Surfaces or backgrounds covered with repeated geometrical figures, figurative elements or inscriptions #Quadrilaterals #Surfaces or backgrounds covered with repeated geometrical figures or designs #Surfaces or backgrounds covered with squares or rectangles (except A 25.7.4) #Squares #Rectangles #Other irregular parallelograms, trapezia and quadrilaterals, quadrilaterals containing one or more rounded corners #Two quadrilaterals, one inside the other #Several quadrilaterals juxtaposed, joined or intersecting #Quadrilaterals with dark surfaces or parts of surfaces