#define LED1 15
#define LED2 2
#define LED3 4
#define LED4 5
#define LED5 18
#define LED6 19
#define LED7 21
#define LED8 22
#define LED9 23

void setup(){
 pinMode(LED3, OUTPUT);
 pinMode(LED6, OUTPUT);
 pinMode(LED9, OUTPUT);
 pinMode(LED1, OUTPUT);
 pinMode(LED2, OUTPUT);
 pinMode(LED4, OUTPUT);
 pinMode(LED5, OUTPUT);
 pinMode(LED7, OUTPUT);
 pinMode(LED8, OUTPUT);
}

void loop(){
  digitalWrite(LED1, HIGH);
  delay(500);
  digitalWrite(LED1, LOW);
  delay(100);
  digitalWrite(LED2, HIGH);
  delay(500);
  digitalWrite(LED2, LOW);
  delay(100);
  digitalWrite(LED3, HIGH);
  delay(100);
  digitalWrite(LED3, LOW);
  delay(100);
  digitalWrite(LED3, HIGH);
  delay(100);
  digitalWrite(LED3, LOW);
  delay(100);
  digitalWrite(LED3, HIGH);
  delay(100);
  digitalWrite(LED3, LOW);
  delay(100);
  digitalWrite(LED3, HIGH);
  delay(100);
  digitalWrite(LED3, LOW);
  delay(100);

  digitalWrite(LED4, HIGH);
  delay(500);
  digitalWrite(LED4, LOW);
  delay(100);
  digitalWrite(LED5, HIGH);
  delay(500);
  digitalWrite(LED5, LOW);
  delay(100);
  digitalWrite(LED6, HIGH);
  delay(100);
  digitalWrite(LED6, LOW);
  delay(100);
  digitalWrite(LED6, HIGH);
  delay(100);
  digitalWrite(LED6, LOW);
  delay(100);
  digitalWrite(LED6, HIGH);
  delay(100);
  digitalWrite(LED6, LOW);
  delay(100);
  digitalWrite(LED6, HIGH);
  delay(100);
  digitalWrite(LED6, LOW);
  delay(100);

  digitalWrite(LED7, HIGH);
  delay(500);
  digitalWrite(LED7, LOW);
  delay(100);
  digitalWrite(LED8, HIGH);
  delay(500);
  digitalWrite(LED8, LOW);
  delay(100);
  digitalWrite(LED9, HIGH);
  delay(100);
  digitalWrite(LED9, LOW);
  delay(100);
  digitalWrite(LED9, HIGH);
  delay(100);
  digitalWrite(LED9, LOW);
  delay(100);
  digitalWrite(LED9, HIGH);
  delay(100);
  digitalWrite(LED9, LOW);
  delay(100);
  digitalWrite(LED9, HIGH);
  delay(100);
  digitalWrite(LED9, LOW);
  delay(100);
}