// C++ code
//
int time = 150;
void setup()
{ 
  for (int i = 2; i <= 6; i++){
    pinMode(i, OUTPUT);
  }
}

void loop()
{
  for (int j = 0; j <= 3; j++){
    for (int n = 2; n <= 6; n++){
      digitalWrite(n, HIGH);    
    } 
    delay(time*3);

    for (int n = 2; n <= 6; n++){
      digitalWrite(n, LOW);    
    } 
    delay(time*3);
  }
  
  for (int j = 0; j <= 3; j++){
    for (int n = 2; n <= 6; n++){
      digitalWrite(n, HIGH);
      delay(time);
      digitalWrite(n, LOW);
  	}     
  }
  
  for (int j = 0; j <= 3; j++){
    for (int n = 6; n >= 2; n--){
      digitalWrite(n, HIGH);
      delay(time);
      digitalWrite(n, LOW);
  	}     
  }
  
  for (int j = 0; j <= 3; j++){
    for (int n = 2; n <= 6; n++){
      digitalWrite(n, HIGH);
      delay(time);
      digitalWrite(n, LOW);
  	} 
    for (int n = 6; n >= 2; n--){
      digitalWrite(n, HIGH);
      delay(time);
      digitalWrite(n, LOW);
  	}     
  }
  

  for (int n = 2; n <= 6; n++){
    digitalWrite(n, LOW);    
  } 
  delay(1000);
  
  for (int j = 0; j <= 3; j++){    
    digitalWrite(2, HIGH);
    digitalWrite(3, HIGH);
    delay(time*2);
    digitalWrite(2, LOW);
    digitalWrite(3, HIGH);
    digitalWrite(4, HIGH);
    delay(time*2);
    digitalWrite(3, LOW);
    digitalWrite(4, HIGH);
    digitalWrite(5, HIGH);
    delay(time*2);
    digitalWrite(4, LOW);
    digitalWrite(5, HIGH);
    digitalWrite(6, HIGH);
    delay(time*2);
    digitalWrite(5, LOW); 
    digitalWrite(6, HIGH); 
    delay(time*2);
    digitalWrite(6, LOW);      
    delay(time*2);

  }
  
  
  
}