const int ledPins[4] = {2, 3, 4, 5}; // Array to store LED pin numbers
const int buttonPin = 8; // Push button pin number

int ledState = LOW; // Initial state of LEDs (OFF)

void setup() {
  // Set LED pins as outputs
  for (int i = 0; i < 4; i++) {
    pinMode(ledPins[i], OUTPUT);
  }
  // Set button pin as input with internal pull-up resistor
  pinMode(buttonPin, INPUT_PULLUP);
}

void loop() {
  // Read button state (HIGH when not pressed, LOW when pressed)
  int buttonState = digitalRead(buttonPin);

  // Toggle LED state on button press (LOW to HIGH or HIGH to LOW)
  if (buttonState == LOW && ledState == HIGH) {
    ledState = LOW;
  } else if (buttonState == HIGH && ledState == LOW) {
    ledState = HIGH;
  }

  // Update all LEDs based on the current state
  for (int i = 0; i < 4; i++) {
    digitalWrite(ledPins[i], ledState);
  }
}