// Define pins for LEDs
int led1 = 2;
int led2 = 3;

// Set pins as output erore deve stare nel setup
//pinMode(led1, OUTPUT);
//pinMode(led2, OUTPUT);

// Create a variable to keep track of which LED is currently on
int currentLED = 1;

// Function to turn on LED1 and turn off LED2
void turnOnLED1() {
  digitalWrite(led1, HIGH);
  digitalWrite(led2, LOW);
}

// Function to turn on LED2 and turn off LED1
void turnOnLED2() {
  digitalWrite(led1, LOW);
  digitalWrite(led2, HIGH);
}

// Main code
void setup() {
  // Set pins as output
pinMode(led1, OUTPUT);
pinMode(led2, OUTPUT);
 
}

void loop() {
  // Check which LED is currently on and switch to the other one
  if (currentLED == 1) {
    turnOnLED2();
    currentLED = 2;
  } else {
    turnOnLED1();
    currentLED = 1;
  }
  
  // Delay for 1 second before switching again
  delay(1000);
}

// Code sourced from: https://www.arduino.cc/en/Tutorial/BlinkWithoutDelay