// declare any constants – these never change
const int buttonPin = 2;
int ledb = 3;
int ledg = 4;

// declare any variables
int buttonState;

void setup() {
  // put your setup code here, to run once:

  // set pin modes in setup
  pinMode(buttonPin, INPUT);
  pinMode(ledb, OUTPUT);
  pinMode(ledg, OUTPUT);

  // initialise serial communication in setup
  Serial.begin(9600);

}

void loop() {
  // put your main code here, to run repeatedly:
  buttonState = digitalRead(buttonPin);

  if (buttonState==1) {
    digitalWrite(ledb,HIGH);
    digitalWrite(ledg,LOW);
  }

  else {
    digitalWrite(ledg,HIGH);
    digitalWrite(ledb,LOW);
  }

  Serial.println(buttonState);

}