// --- Three LEDs Always On (No Blinking, No Button Input) ---

// Define the pins connected to the LEDs.
// This array holds the digital pin numbers for all 3 LEDs.
const int ledPins[] = {2, 3, 4};  // Digital pin numbers for the 3 LEDs.

void setup() {
  // The setup() function runs once when the Arduino is powered on or reset.
  // It's used to initialize pin modes and other settings.

  // Set up all LED pins as OUTPUTs and turn them ON permanently.
  // We loop through the 'ledPins' array to configure each LED.
  for (int i = 0; i < 3; i++) {
    pinMode(ledPins[i], OUTPUT);      // Configure the current LED pin as an OUTPUT.
    digitalWrite(ledPins[i], HIGH);   // Set the LED to HIGH (ON) permanently.
  }

  // Serial communication can still be initialized if you need it for other debugging,
  // but it's not strictly necessary for just keeping LEDs on.
  Serial.begin(9600);
}


void loop() {
  // The loop() function runs continuously after setup() completes.
  // In this version, there's nothing active to do in the loop,
  // as the LEDs are set to HIGH in setup() and remain that way.
  // This keeps the program very simple and efficient.
}