// Blink an LED connected to digital pin 13
// Components: LED, 220Ω resistor, breadboard, Arduino

const int ledPin = 13; 
const int ledPin1 = 12;  // LED connected to digital pin 13

void setup() {
  pinMode(ledPin, OUTPUT);  
  pinMode(ledPin1, OUTPUT);// Set pin 13 as an output
}

void loop() {
  digitalWrite(ledPin, HIGH);  // Turn the LED on
  delay(100);                 // Wait for 1 second

  digitalWrite(ledPin, LOW);   // Turn the LED off
  delay(100);   
  
  digitalWrite(ledPin1, HIGH);   
  delay(100); 
  
  digitalWrite(ledPin1, LOW);   
  delay(100);       // Wait for 1 second
}