Stunning electric puzzle. Diode LED circuit is a shocking electric puzzle easy to play and hard to win, Connect all the wires to the battery power to light up all the Diode LED in the shortest time possible! Just rotate the wires in a suitable direction & connect them to the power supply. You can choose 4 different difficulty levels Easy, Normal, Hard, and Extreme. Circuit simulation game consists to Connect every available cable and make sure every cable is connected to the electrical energy from a battery.