LED Input/Output for Arduino

Sketch.java

bool isHigh = true;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  pinMode(12, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  isHigh = !isHigh;
  digitalWrite(12, isHigh ? HIGH : LOW);
  int response = digitalRead(12);
  Serial.println(response);
  delay(1000);
}