const int relayPin = 6;

const int buttonPins[] = {A1, A2, A3, A4, A5};
const int numButtons = sizeof(buttonPins) / sizeof(buttonPins[0]);

int correctSequence[] = {1, 3, 2, 1, 5, 4, 2};
const int sequenceLength = sizeof(correctSequence) / sizeof(correctSequence[0]);

int inputIndex = 0;

unsigned long relayOnTime = 5000; // 5 seconds

void setup() {
  pinMode(relayPin, OUTPUT);
  digitalWrite(relayPin, LOW);

  for (int i = 0; i < numButtons; i++) {
    pinMode(buttonPins[i], INPUT_PULLUP);
  }
}

void loop() {
  for (int i = 0; i < numButtons; i++) {
    if (digitalRead(buttonPins[i]) == LOW) {
      delay(50); // Debounce
      while (digitalRead(buttonPins[i]) == LOW); // Wait for button release
      delay(50); // Debounce

      if (i + 1 == correctSequence[inputIndex]) {
        inputIndex++;
        if (inputIndex == sequenceLength) {
          activateRelay();
          inputIndex = 0; // Reset the inputIndex after successful activation
        }
      } else {
        inputIndex = 0; // Reset the inputIndex if an incorrect button is pressed
      }
    }
  }
}

void activateRelay() {
  digitalWrite(relayPin, HIGH);
  delay(relayOnTime);
  digitalWrite(relayPin, LOW);
}