int led1 = 13;
int led2 = 12;
int SEC =1000;
void setup() {
 pinMode(led1, OUTPUT);
pinMode(led2, OUTPUT);
}

void loop() {
digitalWrite(led1, HIGH);
digitalWrite(led2, HIGH);
delay(SEC);
delay(SEC);
delay(SEC);
digitalWrite(led1, LOW);
delay(SEC);
delay(SEC);
digitalWrite(led2, LOW);
delay(SEC);
digitalWrite(led1,HIGH);
delay(SEC);
delay(SEC);
delay(SEC);
digitalWrite(led1, LOW);
delay(SEC);
digitalWrite(led2, HIGH);
delay(SEC);
delay(SEC);
digitalWrite(led1, HIGH);
delay(SEC);
delay(SEC);
delay(SEC);
digitalWrite(led1, LOW);
digitalWrite(led2, LOW);

}