const int buttonPin = 2;
        const int ledPin = 9;
        
        void setup() {
          pinMode(buttonPin, INPUT_PULLUP);
          pinMode(ledPin, OUTPUT);
          Serial.begin(9600);
        }
        
        void loop() {
          int buttonstate = digitalRead(buttonPin);
        
          if (buttonstate==LOW){
            digitalWrite(ledPin, HIGH);
            Serial.println("LED is ON");
          }else{
            digitalWrite(ledPin, LOW);
            Serial.println("LED is OFF");
          }
          delay(200);
        }