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

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