const int relayPins[] = {3, 4, 5, 6, 7, 8, 9, 10};
const int numRelays = sizeof(relayPins) / sizeof(relayPins[0]);

// Button pin
const int buttonPin = 34;

// Relay states (0 = off, 1 = on)
int relayStates[numRelays] = {0};

void setup() {
    for (int i = 0; i < numRelays; i++) {
        pinMode(relayPins[i], OUTPUT);
        digitalWrite(relayPins[i], LOW); // Turn off all relays initially
    }
    pinMode(buttonPin, INPUT_PULLUP);
}

void loop() {
    // Read button state
    int buttonState = digitalRead(buttonPin);

    // Mode 1: All relays sequentially
    if (buttonState == LOW) {
        for (int i = 0; i < numRelays; i++) {
            digitalWrite(relayPins[i], HIGH); // Turn on relay
            delay(1000); // Wait 1 second
            digitalWrite(relayPins[i], LOW); // Turn off relay
            delay(1000); // Wait 1 second
        }
    }
    // Mode 2: Specific relay pairs
    else {
        digitalWrite(relayPins[0], HIGH); // Relay 1
        digitalWrite(relayPins[4], HIGH); // Relay 5
        delay(2000); // Wait 2 seconds
        digitalWrite(relayPins[0], LOW);
        digitalWrite(relayPins[4], LOW);
        
        digitalWrite(relayPins[1], HIGH); // Relay 2
        digitalWrite(relayPins[5], HIGH); // Relay 6
        delay(2000);
        digitalWrite(relayPins[1], LOW);
        digitalWrite(relayPins[5], LOW);
        
        digitalWrite(relayPins[2], HIGH); // Relay 3
        digitalWrite(relayPins[6], HIGH); // Relay 7
        delay(2000);
        digitalWrite(relayPins[2], LOW);
        digitalWrite(relayPins[6], LOW);


        digitalWrite(relayPins[3], HIGH); // Relay 4
        digitalWrite(relayPins[7], HIGH); // Relay 8
        delay(2000);
        digitalWrite(relayPins[3], LOW);
        digitalWrite(relayPins[7], LOW);
    }
}