Dutch artist  Maarten Baas produces artworks that lay at the intersection of visual art, performance, and design, creating manual clocks that are erased and redrawn on the stroke of each minute. In pieces like Grandfather Clock and Schiphol Clock Baas places himself within the structure of the time-telling devices, functioning as the works’ human mechanism. Other pieces from his Real Time series use the assistance of another performer to create 12-hour films, such as a line of perpetually swept trash doubling as a clock arm.[…]

Source: Human-Powered Clocks by Maarten Baas Physically Mark the Passage of Time