void setup() {
  pinMode(13, OUTPUT);
  pinMode(12, OUTPUT);
  pinMode(11, OUTPUT);
  pinMode(10, OUTPUT);
  pinMode(7, OUTPUT);
  pinMode(5, OUTPUT);
  pinMode(2, OUTPUT);
}
void loop() {
  digitalWrite(13, HIGH);  
  delay(100);
  digitalWrite(13, LOW); 

  digitalWrite(12, HIGH);  
  delay(100);
  digitalWrite(12, LOW);   

  digitalWrite(11, HIGH);  
  delay(100);
  digitalWrite(11, LOW);   

  digitalWrite(10, HIGH);
  delay(100);
  digitalWrite(10, LOW);   

  digitalWrite(7, HIGH);
  delay(100);
  digitalWrite(7, LOW);  

  digitalWrite(5, HIGH);
  delay(100);
  digitalWrite(5, LOW);   

  digitalWrite(2, HIGH);
  delay(100);
  digitalWrite(2, LOW);                            
}