D1

There was just enough light to show the way. The so called way were tunnels. The size of the tunnel was just enough for two robots to move side by side. There was no need for ventilation. The robots do not need to breathe.

The robots looked alike. Round head, rectangular boxy body, tubular extremities. Some days it looked like they float as they move. Some days they were on wheels.

The network of tunnels was like webs that connected the underground world. The whole area between Stratosphere and Mandalay Bay was covered by the network. For a human mind, it was unthinkable. How could they navigate inside the network? The were no street signs. There were no codes like the runways of the airport. But it made sense to them. If you were to ask them, they would show you the world of ants. The ants survived for hundreds of years in networks like that.

When Amy first saw it, her human mind had the same fear. It was too claustrophobic. It was not until she got to CCC that she felt a little better. Central Control Center was located just beneath the Venetian. It was the hub. It was like the plaza of a city in the human world. It was also the main power source for all robots. Along the walls were power outlets for them to power up. Since they had better batteries, one charge lasted one month.