Lifetime is a clock that simulates the behavior of cells at a microscopic level, where elements instead of dividing themselves, they join together every time unit (minute, hour) to create more complex organisms. In the project there are three different kinds of "cells", each to represent a time unit, respectively seconds, minutes and hours. The corpuscles can feel the distance between each other and they move away with different velocities if the near body is the same kind (friend) or a bigger one. The bodies also fear your hand (the mouse cursor) by running away from that, and if we click the mouse we can order the cells in a grid and read the actual time. For visual needs the background can also be changed from white to black by pressing the space bar and also a screenshot can be saved by pressing the button "s".