#define LED  13
#define LED2  9

void setup() {
  // put your setup code here, to run once:
  pinMode(LED,OUTPUT);
  pinMode(LED2,OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite(LED,HIGH); 
  digitalWrite(LED2,HIGH); delay(500);
  digitalWrite(LED,LOW); 
  digitalWrite(LED2,LOW);  delay(500);
}