#define LED1 12
#define LED2 2
void setup() {
  //put up your setup code here to run once:
  pinMode(LED1, OUTPUT);
  pinMode(LED2, OUTPUT);
}

void loop() {
  digitalWrite(LED1, HIGH);
  digitalWrite(LED2, LOW);
  delay(1000);
  digitalWrite(LED1, LOW);
  digitalWrite(LED2, HIGH);
  delay(500);
}