Color of this live wallpaper changes with the minutes.
Your brain will remember the color of the background of your smartphone after having checked it.
Because the tint of the background color corresponds to a time, you are able to tell time without having to look at the clock.
You have to take some time to learn the main colours:
* 00 min is red
* 07 min is yellow
* 15 min is green
* 30 min is turquoise
* 40 min is dark blue
* 50 min is purple
* 59 min is red