The Last clock app for the iPad is designed by NewMediology  presents a visual graph of time.  The ratio of time is beautifully displayed at different speeds, forming an never ending loop

Created by NewMediology (Danqing Shi), Last clock is a clock app that uses popular slit scan technique to keep you in factual time, human time and remote time. Just like any other analog clock, the app has three hands: one for seconds, minutes and hours. The hands, however, are made of a slice of live video that gets scanned to the clockface. With different refresh rate for the three hands, the three time circles reflect the rhythms of the space at different temporal resolutions. The app also allows you to stream the last clock camera feed over the internet. via Creative applications network 

Images via Creative Applications Network