Alchemy (noun): an inexplicable or mysterious transmuting.
Can you see the little, swinging electronic circuit mounted on the top of a tiny coil of wire? It is hanging by thin wire from the tip of the vertical rod. The rod attaches to a large copper dish that contains a piece of metallic zinc submerged in a bath of ocean water.
These elements chemically combine to generate a tiny bit of electricity.
Electricity flowing through wire creates a magnetic field. The circuitry periodically pulses electricity through the tiny coil. The coil swings because it is alternately attracted to, and then repelled by the blue magnet.