#define LED_pin1 12
#define LED_pin2 2
void setup() {
  // put your setup code here, to run once:
  pinMode(LED_pin1, OUTPUT);
  pinMode(LED_pin2, OUTPUT);

}

void loop() {
  // put your main code here, to run repeatedly:
digitalWrite(LED_pin1, HIGH);
delay(100);
digitalWrite(LED_pin1, LOW);
delay(100);
digitalWrite(LED_pin2, HIGH);
delay(100);
digitalWrite(LED_pin2, LOW);
}