They tirelessly paint the gravel of a Zen garden.
Four imposing robotic arms about 2 meters high develop shapes from the movements of athletes captured on video during previous Olympics.
This artistic installation is signed Jason Bruges.
"It's a mirror, a kind of reflection on what is happening at the Olympics", explains to AFP the British artist behind this work as part of a cultural festival in Tokyo organized on the occasion of the Olympic Games.
The artist draws a parallel between robots and athletes, who repeat for years the same movements to achieve perfection in a very specific field.
“Whether you are a runner, a skateboarder or a cyclist, you are going to condition your body for something unique,” he says.
Jason Bruges and the other members of his “studio” at the crossroads of art and new technologies have designed tailor-made software to analyze and process video sequences of athletes during previous Olympics.
Their body movements have been processed into data and then converted into instructions for the robots, which draw some 150 different lines and shapes.
Jason Bruges, who says he wants to inspire people to see technology from a different perspective, hopes his installation will allow visitors to "reflect, meditate and find calm." Called "The Constant Gardeners" (a nod to the famous book and film "The Constant Gardener", "La Constance du jardinier" in French), his installation was opened to the public on Wednesday in Ueno Park, in the heart of of Tokyo, and must remain in place until the end of the Paralympic Games on September 5.