

Big Ben and the Houses of Parliament rise above a stone bridge, their spires and clock face mirrored in the River Thames at dusk. Peach, rose and powder blue washes fill the sky while small street lamps glow along the bank. The square towers, one with a dark latticed window, disguise the finder squares, and the blotted shapes of the bridge arches and their reflections carry the modules. Dark navy shapes against pale golden washes keep the pattern clear, and the rippled reflection repeats the code structure in the water below.