Powder of the time / clock

The hands of clock stop when there is no energy and we mistake the time.
That’s why a design is proposed to display time even when there is no energy.
The two hands are hidden behind the clock. The hour hand creates magnetic force through battery, and the time is displayed through the iron powders attaching to the hidden hour hand because of this magnetic force.
When the battery dies, the iron powders are detached upon losing the magnetic force.
Through this, we can quickly and easily know that it is time to replace the clock battery.
People’s emotions can be drawn out by having a different concept than that of the existing clock.