Tate Modern showcases The Clock, a film made by Swiss-American visual artist and composer Christian Marclay. Created in 2010, The Clock is a 24-hour video installation made up entirely of film clips from the history of cinema edited together. The time shown in each film clip matches exactly to the present time at which you are watching the film. Therefore, the film not only includes thousands of clips of clocks, but functions as a clock too flowing in real-time. The Clock includes clips from well-known classics to obscure films from a wide range of genres. Within a few minutes, viewers are taken on a journey of different moods and settings from comedy to science fiction, thrillers to westerns. Marclay explores the theme of time – how we are so obsessed with it and how there is never enough of it.