 const int LOOP_LENGTH = 50;
 
 int distance;
+int led = 13;
 boolean is_hand = false;
 unsigned long time;
 unsigned long loop_delay;

    if (!is_hand) {
      is_hand = true;
      Serial.println("ON");
    }
    Serial.print("->");
    Serial.println(distance);

  // initialize serial communication at 9600 bits per second:
  Serial.begin(115200);
  Dist.begin(A0);
  pinMode(led, OUTPUT);   
}

// the loop routine runs over and over again forever:
