 
 
 #define LED_PIN 13 // (Arduino is 13, Teensy is 11, Teensy++ is 6)
+#define JETPACK_PIN 3
 bool blinkState = false;
 
 // MPU control/status vars

    Serial.println(F(")"));
  }

  // configure LED for output
  pinMode(LED_PIN, OUTPUT);


        Serial.print(aaWorld.y);
        Serial.print("\t");
        Serial.println(aaWorld.z);
        break;
      case 'j':
        Serial.print("j\t");
        Serial.println(!digitalRead(JETPACK_PIN)); // pin low -> pressed
        break;
      default:
        Serial.print("ERROR - Command ");
