/* 
  DigitalReadSerial -  Reads a digital input on pin 2, prints the result to the serial monitor  
*/ 
 
// digital pin 2 has a pushbutton attached to it. Give it a name: 
const int pushButtonPin = 2; 
const int ledPin = 13;
boolean ledState = 0;
boolean currentButtonState;
 
// the setup routine runs once when you press reset: 
void setup() { 
  	// initialize serial communication at 9600 bits per second: 
  	Serial.begin(9600); 
  	// make the pushbutton's pin an input:
   	pinMode(pushButtonPin, INPUT); 
		pinMode(ledPin, OUTPUT);
		
	} 
 
// the loop routine runs over and over againforever: 
void loop() { 
  
	// read the input pin: 
  	int buttonState = digitalRead(pushButtonPin);   

	// print out the state of the button: 
  	Serial.println(buttonState); 
   	delay(100);        // delay in between reads for stability 

	// if the button state has changed:
	if (buttonState != currentButtonState){
		currentButtonState = buttonState;

		if (currentButtonState == 1) {
			ledState = !ledState;
		}
		
		digitalWrite(ledPin,ledState);

	}


	}