// Pin numbers connected to the LEDs
const int ledPin1 = 13;
const int ledPin2 = 12;

void setup() {
  // Initialize the LED pins as outputs
  pinMode(ledPin1, OUTPUT);
  pinMode(ledPin2, OUTPUT);
}

void loop() {
  // Turn on LED 1
  digitalWrite(ledPin1, HIGH);
  delay(1000);  // Wait for 1 second

  // Turn off LED 1 and turn on LED 2
  digitalWrite(ledPin1, LOW);
  digitalWrite(ledPin2, HIGH);
  delay(1000);  // Wait for 1 second

  // Turn off LED 2
  digitalWrite(ledPin2, LOW);
  delay(1000);  // Wait for 1 second
}