const int numButtons = 7; // Define the number of buttons
const int lightPins[numButtons] = {14, 15, 16, 17, 18, 19, 20}; // Assign pins for each button
const int buttonPins[numButtons] = {2, 3, 4, 5, 6, 7, 8}; // Assign pins for each light
const int power_btn=9;
const int relay_bulb=37;

const int relayPins[numButtons] = {23,25,27,29,31,33,35};  // relay pins
int buttonStates[numButtons]; // Array to store the state of each button
int numButtonsPressed = 0; // Count of the number of buttons currently pressed
int x=0;
int bulb_time=5;  // you can change the time for indicator bulb relay in seconds. 120 seconds = 2 minutes
void setup() {
  
  // Initialize button pins as inputs
  for (int i = 0; i < numButtons; i++) {
    pinMode(buttonPins[i], INPUT_PULLUP);
  }
  pinMode(power_btn,INPUT_PULLUP);
  // Initialize light pins as outputs
  for (int i = 0; i < numButtons; i++) {
    pinMode(lightPins[i], OUTPUT);
    pinMode(relayPins[i], OUTPUT);
  }
  pinMode(relay_bulb, OUTPUT);
}

void loop() {
 
  // Read the state of each button and store it in the buttonStates array
  if(digitalRead(power_btn)==LOW && x==0){
  for (int i = 0; i < numButtons; i++) {
    buttonStates[i] = digitalRead(buttonPins[i]);
  }

  // Count the number of buttons that are currently pressed
  numButtonsPressed = 0;
  for (int i = 0; i < numButtons; i++) {
    if (buttonStates[i] == LOW) {
      numButtonsPressed++;
    }
  }

  // Turn on the corresponding lights based on the number of buttons pressed
  for (int i = 0; i < numButtonsPressed; i++) {
    digitalWrite(lightPins[i], HIGH);
    digitalWrite(relayPins[i], HIGH);
    digitalWrite(relay_bulb, HIGH);
  }
  
  // Turn off the remaining lights
  for (int i = numButtonsPressed; i < numButtons; i++) {
    digitalWrite(lightPins[i], LOW);
    digitalWrite(relayPins[i], LOW);
  }
  delay(1000); // you can change the time for solenoid relays here delay(milliseconds).
  for(int i=0; i <7; i++){
    digitalWrite(relayPins[i], LOW);
  }
  delay((bulb_time-1)*1000);
  digitalWrite(relay_bulb, LOW);
  x=1;
 
  }
  else if(digitalRead(power_btn)==HIGH){
    for (int i = 0; i < 7; i++) {
    digitalWrite(lightPins[i], LOW);
    digitalWrite(relayPins[i], LOW);
    x=0;
  }
  }
  
}