void setup() {
  // put your setup code here, to run once:
pinMode(13, OUTPUT);
pinMode(12, OUTPUT);
pinMode(8, OUTPUT);
pinMode(7, OUTPUT);
pinMode(4, OUTPUT);
pinMode(3, OUTPUT);
pinMode(2, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
digitalWrite(13, HIGH);
delay(100);
digitalWrite(13, LOW);
delay(100);
digitalWrite(12, HIGH);
delay(100);
digitalWrite(12, LOW);
delay(100);
digitalWrite(8, HIGH);
delay(100);
digitalWrite(8, LOW);
delay(100);
digitalWrite(7, HIGH);
delay(100);
digitalWrite(7, LOW);
delay(100);
digitalWrite(4, HIGH);
delay(100);
digitalWrite(4, LOW);
delay(100);
digitalWrite(3, HIGH);
delay(100);
digitalWrite(3, LOW);
delay(100);
digitalWrite(2, HIGH);
delay(100);
digitalWrite(2, LOW);
delay(100);
digitalWrite(3, HIGH);
delay(100);
digitalWrite(3, LOW);
delay(100);
digitalWrite(4, HIGH);
delay(100);
digitalWrite(4, LOW);
delay(100);
digitalWrite(7, HIGH);
delay(100);
digitalWrite(7, LOW);
delay(100);
digitalWrite(8, HIGH);
delay(100);
digitalWrite(8, LOW);
delay(100);
digitalWrite(12, HIGH);
delay(100);
digitalWrite(12, LOW);
delay(100);
}