int LED1 = 13;
int LED2 = 12;
int LED3 = 11;
int DEL = 1300;
void setup() {
  // put your setup code here, to run once:
pinMode(LED1 , OUTPUT);
pinMode(LED2 , OUTPUT);
pinMode(LED3 , OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
digitalWrite(LED1 , HIGH);
digitalWrite(LED2 , HIGH);
digitalWrite(LED3 , HIGH);
delay(DEL);

digitalWrite(LED1 , HIGH);
digitalWrite(LED2 , LOW);
digitalWrite(LED3 , HIGH);
delay(DEL);

digitalWrite(LED1 , LOW);
digitalWrite(LED2 , HIGH);
digitalWrite(LED3 , LOW);
delay(DEL);

digitalWrite(LED1 , LOW);
digitalWrite(LED2 , LOW);
digitalWrite(LED3 , LOW);
delay(DEL);
}