#define led 13
#define led2 8

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);
  delay(100);
  digitalWrite(led2, HIGH);
  delay((100));
  digitalWrite(led, LOW);
  delay(100);
  digitalWrite(led2, LOW);
  delay((100));
  
}