The red light blinks on the big robot. It hums softly as it lifts its arm high. I watch as the arm moves slowly, back and forth, up and down. Sometimes it stops to click like a clock. A soft whirring sound comes from inside when it turns around. The screen lights up with numbers and lines that dance across it. When the arm finishes moving in all directions, it clicks again, louder this time. Then everything goes dark for a moment before the red light blinks on again.