const int l1 = 2;
const int l2 = 3;
const int l3 = 4;
const int l4 = 5;
const int l5 = 6;
const int l6 = 7;

void setup() {
  
  pinMode(l1, OUTPUT);
  pinMode(l2, OUTPUT);
  pinMode(l3, OUTPUT);
  pinMode(l4, OUTPUT);
  pinMode(l5, OUTPUT);
  pinMode(l6, OUTPUT);
  
}

void loop() {
  b1();
  b1();
  b1();
  b1();
  b1();
  b1();
  delay(50);
  b2();
  b2();
  b2();
  b2();
  delay(50);
  b3();
  b3();
  b3();
  delay(50);
  b4();
  b4();
  b4();
  b4();
  b4();
  b4();
  delay(50);
  b5();
  b5();
  b5();
  delay(50);
  b6();
  b6();
  b6();
  b6();
  delay(50);
  b7();
  b7();
  b7();
  b7();
  
}
void b1(){
    digitalWrite(l1, HIGH);
    digitalWrite(l6, HIGH);
    delay(50);
    digitalWrite(l1, LOW);
    digitalWrite(l6, LOW);
    delay(50);
    digitalWrite(l2, HIGH);
    digitalWrite(l5, HIGH);
    delay(50);
    digitalWrite(l2, LOW);
    digitalWrite(l5, LOW);
    delay(50);
    digitalWrite(l3, HIGH);
    digitalWrite(l4, HIGH);
    delay(50);
    digitalWrite(l3, LOW);
    digitalWrite(l4, LOW);
    delay(50);
    digitalWrite(l2, HIGH);
    digitalWrite(l5, HIGH);
    delay(50);
    digitalWrite(l2, LOW);
    digitalWrite(l5, LOW);
    delay(50);
    digitalWrite(l1, HIGH);
    digitalWrite(l6, HIGH);
    delay(50);
    digitalWrite(l1, LOW);
    digitalWrite(l6, LOW);
    delay(200);
    digitalWrite(l1, HIGH);
    digitalWrite(l6, HIGH);
    delay(50);
    digitalWrite(l1, LOW);
    digitalWrite(l6, LOW);
    delay(50);
}

void b2(){
  digitalWrite(l1, HIGH);
  digitalWrite(l2, HIGH);
  digitalWrite(l3, HIGH);
  digitalWrite(l4, HIGH);
  digitalWrite(l5, HIGH);
  digitalWrite(l6, HIGH);
  delay(50);
  digitalWrite(l1, LOW);
  digitalWrite(l2, LOW);
  digitalWrite(l3, LOW);
  digitalWrite(l4, LOW);
  digitalWrite(l5, LOW);
  digitalWrite(l6, LOW);
  delay(200);


}
void b3(){
    digitalWrite(l1, HIGH);
    digitalWrite(l2, HIGH);
    digitalWrite(l3, HIGH);
    delay(50);
    digitalWrite(l1, LOW);
    digitalWrite(l2, LOW);
    digitalWrite(l3, LOW);
    delay(200);
    digitalWrite(l1, HIGH);
    digitalWrite(l2, HIGH);
    digitalWrite(l3, HIGH);
    delay(50);
    digitalWrite(l1, LOW);
    digitalWrite(l2, LOW);
    digitalWrite(l3, LOW);
    delay(200);
    digitalWrite(l1, HIGH);
    digitalWrite(l2, HIGH);
    digitalWrite(l3, HIGH);
    delay(50);
    digitalWrite(l1, LOW);
    digitalWrite(l2, LOW);
    digitalWrite(l3, LOW);
    delay(200);
    digitalWrite(l4, HIGH);
    digitalWrite(l5, HIGH);
    digitalWrite(l6, HIGH);
    delay(50);
    digitalWrite(l4, LOW);
    digitalWrite(l5, LOW);
    digitalWrite(l6, LOW);
    delay(200);
    digitalWrite(l4, HIGH);
    digitalWrite(l5, HIGH);
    digitalWrite(l6, HIGH);
    delay(50);
    digitalWrite(l4, LOW);
    digitalWrite(l5, LOW);
    digitalWrite(l6, LOW);
    delay(200);
    digitalWrite(l4, HIGH);
    digitalWrite(l5, HIGH);
    digitalWrite(l6, HIGH);
    delay(50);
    digitalWrite(l4, LOW);
    digitalWrite(l5, LOW);
    digitalWrite(l6, LOW);
    delay(200);
}

void b4(){
    digitalWrite(l3, HIGH);
    digitalWrite(l4, HIGH);
    delay(50);
    digitalWrite(l3, LOW);
    digitalWrite(l4, LOW);
    delay(50);
    digitalWrite(l2, HIGH);
    digitalWrite(l5, HIGH);
    delay(50);
    digitalWrite(l2, LOW);
    digitalWrite(l5, LOW);
    delay(50);
    digitalWrite(l1, HIGH);
    digitalWrite(l6, HIGH);
    delay(50);
    digitalWrite(l1, LOW);
    digitalWrite(l6, LOW);
    delay(200);
}
void b5(){
    digitalWrite(l1, HIGH);
    delay(25);
    digitalWrite(l1, LOW);
    delay(50);
    digitalWrite(l2, HIGH);
    delay(25);
    digitalWrite(l2, LOW);
    delay(50);
    digitalWrite(l3, HIGH);
    delay(25);
    digitalWrite(l3, LOW);
    delay(50);
    digitalWrite(l4, HIGH);
    delay(25);
    digitalWrite(l4, LOW);
    delay(50);
    digitalWrite(l5, HIGH);
    delay(25);
    digitalWrite(l5, LOW);
    delay(50);
    digitalWrite(l6, HIGH);
    delay(25);
    digitalWrite(l6, LOW);
    delay(50);
    digitalWrite(l5, HIGH);
    delay(25);
    digitalWrite(l5, LOW);
    delay(50);
    digitalWrite(l4, HIGH);
    delay(25);
    digitalWrite(l4, LOW);
    delay(50);
    digitalWrite(l3, HIGH);
    delay(25);
    digitalWrite(l3, LOW);
    delay(50);
    digitalWrite(l2, HIGH);
    delay(25);
    digitalWrite(l2, LOW);
    delay(50);
    digitalWrite(l1, HIGH);
    delay(25);
    digitalWrite(l1, LOW);
    delay(50);


}
void b6(){
    digitalWrite(l1, HIGH);
    delay(100);
    digitalWrite(l2, HIGH);
    delay(100);
    digitalWrite(l3, HIGH);
    delay(100);
    digitalWrite(l4, HIGH);
    delay(100);
    digitalWrite(l5, HIGH);
    delay(100);
    digitalWrite(l6, HIGH);
    delay(100);
    digitalWrite(l1, LOW);
    digitalWrite(l2, LOW);
    digitalWrite(l3, LOW);
    digitalWrite(l4, LOW);
    digitalWrite(l5, LOW);
    digitalWrite(l6, LOW);
    delay(200);
}
void b7(){
    digitalWrite(l1, HIGH);
    delay(100);
    digitalWrite(l2, HIGH);
    delay(100);
    digitalWrite(l3, HIGH);
    delay(100);
    digitalWrite(l4, HIGH);
    delay(100);
    digitalWrite(l5, HIGH);
    delay(100);
    digitalWrite(l6, HIGH);
    delay(100);
    digitalWrite(l6, LOW);
    delay(100);
    digitalWrite(l5, LOW);
    delay(100);
    digitalWrite(l4, LOW);
    delay(100);
    digitalWrite(l3, LOW);
    delay(100);
    digitalWrite(l2, LOW);
    delay(100);
    digitalWrite(l1, LOW);
    delay(100);

}