Timer Lighting / lighting

As time goes by, the length of lighting is getting shorter. Finally, it turns off.
This lighting can be used to make time management better when you have a break time in an office.
First, what you need to do is seating near this lighting, planning time for break in you mind. Second, adjusting a height of bar of lighting as aount of time for break you want. Third, a bar of lighting is getting shorter while you are enjoying a break. Finally, when working time comes, lighting turns off.