Complex harmony

30cm x 30cm (12" x 12") 40cm x 40cm (16" x 16") 60cm x 60cm (24" x 24") 75cm x 75cm (30" x 30") 90cm x 90cm (35" x 35") 100cm x 100cm (39" x 39") 120cm x 120cm (47" x 47")