// useing a push button
// to control a LED

int ledPin = 13;
int buttonPin = 12;

void setup() {
  Serial.begin(9500);
  pinMode(ledPin, OUTPUT);
  pinMode(buttonPin, INPUT_PULLUP);
}

void loop() {

  // create a variable to store
  // the "state" of the push button
  int buttonState = digitalRead(buttonPin);

  // the push button will give a reading
  // of '1'->"true"->"HIGH"
  // when it's not beeing pressed

  // print the reading of the push button
  // to the serial monitor
  Serial.print("button state= ");
  Serial.println(buttonState);

  // turn the LED "on" when
  // the push button reads "false"
  if (buttonState == true) {
    digitalWrite(ledPin, false);
  }

  //turn the LED "off" when
  // the push button reads "true"
  else {
    digitalWrite(ledPin, true);
  }
}