const int DELAY_TIME_1 = 3000;  // Delay time for Relay 1 in milliseconds
const int RELAY_ON_TIME = 5000; // Time Relay stays on 

const int RELAY_1_PIN = 2;
const int RELAY_2_PIN = 3;
const int RELAY_3_PIN = 4;

const int BUTTON_1_PIN = 5;
const int BUTTON_2_PIN = 6;
const int BUTTON_3_PIN = 7;
const int MODE_BUTTON_PIN = 13;

volatile bool relay1On = false;
volatile bool relay2On = false;
volatile bool relay3On = false;
volatile bool manualMode = false;

unsigned long delayStartTime = 0; // Start time of the delay
unsigned long currentMillis;  // Current time in milliseconds

void setup() {
  pinMode(RELAY_1_PIN, OUTPUT);
  pinMode(RELAY_2_PIN, OUTPUT);
  pinMode(RELAY_3_PIN, OUTPUT);
  pinMode(BUTTON_1_PIN, INPUT_PULLUP);
  pinMode(BUTTON_2_PIN, INPUT_PULLUP);
  pinMode(BUTTON_3_PIN, INPUT_PULLUP);
  pinMode(MODE_BUTTON_PIN, INPUT_PULLUP);
}

void loop() {
  if (digitalRead(MODE_BUTTON_PIN) == LOW) {
    manualMode = !manualMode;
    delay(200); // Debounce the button
    digitalWrite(RELAY_1_PIN, LOW);
    digitalWrite(RELAY_2_PIN, LOW);
    digitalWrite(RELAY_3_PIN, LOW);
    relay1On = false;
    relay2On = false;
    relay3On = false;
  }

  if (manualMode) {
    // Manual mode
    if (digitalRead(BUTTON_1_PIN) == LOW) {
      digitalWrite(RELAY_1_PIN, !relay1On);
      relay1On = !relay1On;
      delay(200); // Debounce the button
    }
    if (digitalRead(BUTTON_2_PIN) == LOW) {
      digitalWrite(RELAY_2_PIN, !relay2On);
      relay2On = !relay2On;
      delay(200); // Debounce the button
    }
    if (digitalRead(BUTTON_3_PIN) == LOW) {
      digitalWrite(RELAY_3_PIN, !relay3On);
      relay3On = !relay3On;
      delay(200); // Debounce the button
    }
  } else {
    // Auto mode

    if (!relay1On && !relay2On && !relay3On) {
    
      currentMillis = millis();
      //if (currentMillis - delayStartTime >= DELAY_TIME_1) {
        delay(3000);
        digitalWrite(RELAY_1_PIN, HIGH);
        delayStartTime = currentMillis; // Record start time of the on time
        relay1On = true;
     // }
    }
    if (relay1On && !relay2On && !relay3On) {
      currentMillis = millis();
      if (currentMillis - delayStartTime >= RELAY_ON_TIME) {
        digitalWrite(RELAY_1_PIN, LOW);
        digitalWrite(RELAY_2_PIN, HIGH);
        delayStartTime = currentMillis; // Record start time of the on time
        relay1On = false;
        relay2On = true;
      }
    }
    if (!relay1On && relay2On && !relay3On) {
      currentMillis = millis();
      if (currentMillis - delayStartTime >= RELAY_ON_TIME) {
        digitalWrite(RELAY_2_PIN, LOW);
        digitalWrite(RELAY_3_PIN, HIGH);
        delayStartTime = currentMillis; // Record start time of the on time
        relay2On = false;
        relay3On = true;
      }
    }
 if (!relay1On && !relay2On && relay3On) {
      currentMillis = millis();
      if (currentMillis - delayStartTime >= RELAY_ON_TIME) {
        digitalWrite(RELAY_3_PIN, LOW);
        delayStartTime = currentMillis; // Record start time of the on time
        relay3On = false;
      }
    }
  }
   }