void setup() {
 pinMode(13, OUTPUT);
 pinMode(12,OUTPUT);
 pinMode(10,OUTPUT); 
  pinMode(9,OUTPUT);
 pinMode(8,OUTPUT);
 pinMode(7, OUTPUT);
 pinMode(6,OUTPUT);
 pinMode(5,OUTPUT); 
  pinMode(4,OUTPUT);
 pinMode(3,OUTPUT);
}

void loop() {
  digitalWrite(13, HIGH);
  delay(100);
  digitalWrite(13, LOW);
  delay(100);
  
  digitalWrite(12, HIGH);
  delay(100);
  digitalWrite(12, LOW);
  delay(100);
  
  digitalWrite(10, HIGH);
  delay(100);
  digitalWrite(10, LOW);
  delay(100);
  
  digitalWrite(9, HIGH);
  delay(100);
  digitalWrite(9, LOW);
  delay(100);
  
   digitalWrite(8, HIGH);
  delay(100);
  digitalWrite(8, LOW);
  delay(100);
  
  digitalWrite(7, HIGH);
  delay(100);
  digitalWrite(7, LOW);
  delay(100);
  
  digitalWrite(6, HIGH);
  delay(100);
  digitalWrite(6, LOW);
  delay(100);
  
  digitalWrite(5, HIGH);
  delay(100);
  digitalWrite(5, LOW);
  delay(100);
  
   digitalWrite(4, HIGH);
  delay(100);
  digitalWrite(4, LOW);
  delay(100);
  
  digitalWrite(3, HIGH);
  delay(100);
  digitalWrite(3, LOW);
  delay(100);
}