void setup() {
  pinMode(2, OUTPUT); 
  pinMode(3, OUTPUT); 
  pinMode(4, OUTPUT); 
  pinMode(5, OUTPUT); 
  pinMode(6, OUTPUT); 
  pinMode(7, OUTPUT); 
}

void loop() {

for(int sayac = 1;sayac <= 5;sayac++) {
  digitalWrite(2, HIGH); 
  delay(50); 
  digitalWrite(2, LOW); 
  delay(50); 
  digitalWrite(3, HIGH); 
  delay(50); 
  digitalWrite(3, LOW); 
  delay(50); 
  digitalWrite(4, HIGH); 
  delay(50);
  digitalWrite(4, LOW);
  delay(50);

  digitalWrite(5, HIGH); 
  delay(50); 
  digitalWrite(5, LOW); 
  delay(50); 
  digitalWrite(6, HIGH); 
  delay(50); 
  digitalWrite(6, LOW); 
  delay(50); 
  digitalWrite(7, HIGH); 
  delay(50);
  digitalWrite(7, LOW);
  delay(50);

  digitalWrite(6, HIGH); 
  delay(50); 
  digitalWrite(6, LOW); 
  delay(50); 
  digitalWrite(5, HIGH); 
  delay(50); 
  digitalWrite(5, LOW); 
  delay(50); 
  digitalWrite(4, HIGH); 
  delay(50);
  digitalWrite(4, LOW);
  delay(50);

  digitalWrite(3, HIGH); 
  delay(50); 
  digitalWrite(3, LOW); 
  delay(50); 
  digitalWrite(2, HIGH); 
  delay(50); 
  digitalWrite(2, LOW); 
  delay(50); 
  digitalWrite(1, HIGH); 
  delay(50);
  digitalWrite(1, LOW);
  delay(50);
}

for(int sayac = 1;sayac <= 15;sayac++) {
  digitalWrite(2, HIGH); 
  digitalWrite(3, HIGH);   
  digitalWrite(4, HIGH); 
  delay(50); 
  digitalWrite(2, LOW);  
  digitalWrite(3, LOW); 
  digitalWrite(4, LOW);
  delay(50);

  digitalWrite(5, HIGH); 
  digitalWrite(6, HIGH);   
  digitalWrite(7, HIGH); 
  delay(50); 
  digitalWrite(5, LOW);  
  digitalWrite(6, LOW); 
  digitalWrite(7, LOW);
  delay(50);
}


for(int sayac = 1;sayac <= 5;sayac++) {
  for(int sayac2 = 1;sayac2 <= 5;sayac2++) {
  digitalWrite(2, HIGH); 
  digitalWrite(3, HIGH);   
  digitalWrite(4, HIGH); 
  delay(50); 
  digitalWrite(2, LOW);  
  digitalWrite(3, LOW); 
  digitalWrite(4, LOW);
  delay(50);
  }
  for(int sayac3 = 1;sayac3 <= 5;sayac3++) {
  digitalWrite(5, HIGH); 
  digitalWrite(6, HIGH);   
  digitalWrite(7, HIGH); 
  delay(50); 
  digitalWrite(5, LOW);  
  digitalWrite(6, LOW); 
  digitalWrite(7, LOW);
  delay(50);
  }
}

}