const int GLED = 9 ;
const int RLED = 10 ;

String correctPassword = "8012";
void setup() {
 
pinMode(GLED , OUTPUT);
pinMode(RLED , OUTPUT);

Serial.begin(9600);

digitalWrite(GLED , LOW);
digitalWrite(RLED , LOW);

Serial.println("Enter PIN: ");
}

void loop() {
 
if(Serial.available() > 0) {
  String inputPassword = Serial.readStringUntil('\n');

  inputPassword.trim();

  if(inputPassword.equals(correctPassword)) {
    digitalWrite(GLED , HIGH);
    digitalWrite(RLED , LOW);

    Serial.println("PIN Correct : Green Light ON ");
  }
else {
     digitalWrite(GLED , LOW);
     digitalWrite(RLED , HIGH);

    Serial.println("PIN Incorrect : Red Light ON ");
  }
}
}