Countdown Timer

Problem: in most timers, there's no visual clue other than a line of number you have to process. A progress bar could be a solution but is restricted by the screen size it's in.

Solution: As the countdown goes on, the dot in the middle moves along the spiral and make it shorter, it frees up more space in the center of the spiral, which allows the time in the center to get bigger. It gives two visual clues, both carry a message of imminence.