const int relay1 = 6;  // Assuming relay1 is connected to pin 6
const int relay2 = 7;
const int relay3 = 8;
const int relay4 = 9;

const int button1 = 2;  // Assuming button1 is connected to pin 2
const int button2 = 3;
const int button3 = 4;
const int button4 = 5;

// Variables to store the button states and relay states
int buttonState1 = 0;
int lastButtonState1 = 0;
int relayState1 = LOW;

int buttonState2 = 0;
int lastButtonState2 = 0;
int relayState2 = LOW;

int buttonState3 = 0;
int lastButtonState3 = 0;
int relayState3 = LOW;

int buttonState4 = 0;
int lastButtonState4 = 0;
int relayState4 = LOW;

void setup() {
  // Initialize the button pins as inputs
  pinMode(button1, INPUT_PULLUP);
  pinMode(button2, INPUT_PULLUP);
  pinMode(button3, INPUT_PULLUP);
  pinMode(button4, INPUT_PULLUP);

  // Initialize the relay pins as outputs
  pinMode(relay1, OUTPUT);
  pinMode(relay2, OUTPUT);
  pinMode(relay3, OUTPUT);
  pinMode(relay4, OUTPUT);

  // Initially turn off all relays
  digitalWrite(relay1, LOW);
  digitalWrite(relay2, LOW);
  digitalWrite(relay3, LOW);
  digitalWrite(relay4, LOW);
}

void loop() {
  // Read the state of the buttons
  buttonState1 = digitalRead(button1);
  buttonState2 = digitalRead(button2);
  buttonState3 = digitalRead(button3);
  buttonState4 = digitalRead(button4);

  // Check if button 1 is pressed (state changed from HIGH to LOW)
  if (buttonState1 == LOW && lastButtonState1 == HIGH) {
    relayState1 = !relayState1;  // Toggle relay state
    digitalWrite(relay1, relayState1);  // Update relay
  }
  lastButtonState1 = buttonState1;  // Save the current state as last state

  // Check if button 2 is pressed (state changed from HIGH to LOW)
  if (buttonState2 == LOW && lastButtonState2 == HIGH) {
    relayState2 = !relayState2;  // Toggle relay state
    digitalWrite(relay2, relayState2);  // Update relay
  }
  lastButtonState2 = buttonState2;  // Save the current state as last state

  // Check if button 3 is pressed (state changed from HIGH to LOW)
  if (buttonState3 == LOW && lastButtonState3 == HIGH) {
    relayState3 = !relayState3;  // Toggle relay state
    digitalWrite(relay3, relayState3);  // Update relay
  }
  lastButtonState3 = buttonState3;  // Save the current state as last state

  // Check if button 4 is pressed (state changed from HIGH to LOW)
  if (buttonState4 == LOW && lastButtonState4 == HIGH) {
    relayState4 = !relayState4;  // Toggle relay state
    digitalWrite(relay4, relayState4);  // Update relay
  }
  lastButtonState4 = buttonState4;  // Save the current state as last state
}