Greyworld

Their goal was to create works that articulated public spaces, allowing some form of self-expression in areas of the city that people can see every day but would normally exclude and ignore.

In each case greyworld took a set of ordinary street railings and tuned them so that when you run a stick or an umbrella along them, rather than making the 'clack-clack-clack' sound as expected, they played The Girl from Ipanema.

Bridge 2, drew on ideas that Greyworld had explored in a previous work of art Playground, installed in the Yorkshire Sculpture Park in the UK.

Although they have built up a rich history of acclaimed works since their formation in 1993, their most celebrated piece so far is probably The Source – a permanent installation for the new London Stock Exchange: A cube of 9×9×9 (729 in total) spherical balls are suspended on cables that run the full 32 metres height of the main atrium of the newly designed building.

[1] These spheres, controlled by a computer running Python scripts, can move themselves independently of each other, forming dynamic shapes, characters and fluid-like motions that reflects the nature of the stock market itself.

The sculpture opens the market each morning at 8am, with the spheres breaking free from their default cube arrangement to form elegant patterns and shapes.

Throughout the day the sculpture responds to reputable news feed and displays snapshots of the current headlines, written in full height of the atrium.

Drawing on its history and on the idea of a maze as a place of furtive conversation and flirtation, Greyworld have created a gentle soundwork that affects the visitors' experience of their journey from entrance to the centre and back again.

As visitors pass through the many green corridors of the maze, they are tempted to follow tantalising sounds – a fragment of music, a snatch of laughter, the seductive rustle of fine silks or the whispers of an illicit conversation as it disappears around a corner and into a dead-end.

Slowly the sounds weave together in the visitors mind to create a rich tapestry of the other people who have passed through the maze over the centuries and lost themselves in the seductive privacy of its secluded corners.

However, the six-metre-high (20 ft) monument seeks inspiration from passers-by, inviting them to strike poses which he copies, continually changing his form in a light-hearted and mischievous way.