Here we see the human assistant performing the repetitive, mindless task of applying thin, uniform, transparent, slightly coloured layers. This is the only work the human does, (8 times, after every 3 stages painted by the robot). The human also waits for the paint to dry.
At each stage the robot analyses images of the subjects, and takes decisions about the location, direction and length of each brush-stroke (3 different sizes of brush are used in total).
Between each of the 32 stages, the robot takes a photo of the paintings in progress. It then uses this information to decide where and how to place the next brush-strokes.