const int button1 = 31;
const int button2 = 32;
const int led1 = 13;

const int button3 = 33;
const int button4 = 34;
const int led2 = 12;

const int button5 = 35;
const int button6 = 36;
const int led3 = 11;

const int button7 = 37;
const int button8 = 38;
const int led4 = 10;

const int button9 = 39;
const int button10 = 40;
const int led5 = 9;

const int buzzer = 8; // Added buzzer pin

void setup() {
  pinMode(button1, INPUT_PULLUP);
  pinMode(button2, INPUT_PULLUP);
  pinMode(led1, OUTPUT);

  pinMode(button3, INPUT_PULLUP);
  pinMode(button4, INPUT_PULLUP);
  pinMode(led2, OUTPUT);

  pinMode(button5, INPUT_PULLUP);
  pinMode(button6, INPUT_PULLUP);
  pinMode(led3, OUTPUT);

  pinMode(button7, INPUT_PULLUP);
  pinMode(button8, INPUT_PULLUP);
  pinMode(led4, OUTPUT);

  pinMode(button9, INPUT_PULLUP);
  pinMode(button10, INPUT_PULLUP);
  pinMode(led5, OUTPUT);

  pinMode(buzzer, OUTPUT); // Added buzzer pin
}

void loop() {
  // Check for simultaneous button press for LED1
  if (digitalRead(button1) == LOW && digitalRead(button2) == LOW) {
    digitalWrite(led1, HIGH);
  } else {
    digitalWrite(led1, LOW);
  }

  // Check for simultaneous button press for LED2
  if (digitalRead(button3) == LOW && digitalRead(button4) == LOW) {
    digitalWrite(led2, HIGH);
  } else {
    digitalWrite(led2, LOW);
  }

  // Check for simultaneous button press for LED3
  if (digitalRead(button5) == LOW && digitalRead(button6) == LOW) {
    digitalWrite(led3, HIGH);
  } else {
    digitalWrite(led3, LOW);
  }

  // Check for simultaneous button press for LED4
  if (digitalRead(button7) == LOW && digitalRead(button8) == LOW) {
    digitalWrite(led4, HIGH);
  } else {
    digitalWrite(led4, LOW);
  }

  // Check for simultaneous button press for LED5
  if (digitalRead(button9) == LOW && digitalRead(button10) == LOW) {
    digitalWrite(led5, HIGH);
  } else {
    digitalWrite(led5, LOW);
  }

  // Check for simultaneous press of all buttons and sound the buzzer
  if (digitalRead(button1) == LOW && digitalRead(button2) == LOW &&
      digitalRead(button3) == LOW && digitalRead(button4) == LOW &&
      digitalRead(button5) == LOW && digitalRead(button6) == LOW &&
      digitalRead(button7) == LOW && digitalRead(button8) == LOW &&
      digitalRead(button9) == LOW && digitalRead(button10) == LOW) {
    tone(buzzer, 1000); // You can adjust the frequency as needed
  } else {
    noTone(buzzer);
  }
}