const int relayPins[] = {2, 3, 4, 5, 6}; // Pins where the relays are connected
const int buttonPin = 7;                 // Pin where the button is connected
bool buttonState = LOW;                  // Current state of the button
bool lastButtonState = LOW;              // Previous state of the button
unsigned long lastDebounceTime = 0;      // Last time the button state was toggled
unsigned long debounceDelay = 50;        // Debounce time in milliseconds

void setup() {
  // Initialize the relay pins as outputs
  for (int i = 0; i < 5; i++) {
    pinMode(relayPins[i], OUTPUT);
    digitalWrite(relayPins[i], LOW); // Ensure relays are off initially
  }
  
  // Initialize the button pin as an input with an internal pull-up resistor
  pinMode(buttonPin, INPUT_PULLUP);
}

void loop() {
  int reading = digitalRead(buttonPin);

  // Check if the button state has changed
  if (reading != lastButtonState) {
    lastDebounceTime = millis();
  }

  // If the button state has been stable for the debounce delay, toggle the button state
  if ((millis() - lastDebounceTime) > debounceDelay) {
    if (reading != buttonState) {
      buttonState = reading;
    }
  }

  // If the button is pressed, blink the relays
  if (buttonState == LOW) { // Since using INPUT_PULLUP, LOW means the button is pressed
    for (int i = 0; i < 5; i++) {
      digitalWrite(relayPins[i], HIGH); // Turn the relay on
    }
    delay(500); // Wait for 500 milliseconds

    for (int i = 0; i < 5; i++) {
      digitalWrite(relayPins[i], LOW); // Turn the relay off
    }
    delay(500); // Wait for 500 milliseconds
  } else {
    // Ensure all relays are turned off when the button is not pressed
    for (int i = 0; i < 5; i++) {
      digitalWrite(relayPins[i], LOW);
    }
  }

  lastButtonState = reading; // Save the current button state
}