void setup() {
  int x = 13;
  while (x >= 8) {
    pinMode(x, OUTPUT);
    x = x - 1;
  }
}

void loop() {
ltor();
rtol();
hled();
lled();
hled();
lled();


  /////////////////////////////////////////
 
 

 
  int b1 = 13;
  while (b1 >= 8) {
    digitalWrite(b1, 1);
    b1 = b1 - 1;
  }
  delay(500);

  int c1 = 13;
  while (c1 >= 8) {
    digitalWrite(c1, 0);
    c1 = c1 - 1;
  }
  int b11 = 13;
  while (b11 >= 8) {
    digitalWrite(b11, 1);
    b11 = b11 - 1;

  }
  delay(500);

  int c11 = 13;
  while (c11 >= 8) {
    digitalWrite(c11, 0);
    c11 = c11 - 1;

  }
  delay(500);

  digitalWrite(13, 1); digitalWrite(12, 0); digitalWrite(11, 0); digitalWrite(10, 0); digitalWrite(9, 0); digitalWrite(8, 1);
  delay(500);
  digitalWrite(13, 0); digitalWrite(12, 1); digitalWrite(11, 0); digitalWrite(10, 0); digitalWrite(9, 1); digitalWrite(8, 0);
  delay(500);
  digitalWrite(13, 0); digitalWrite(12, 0); digitalWrite(11, 1); digitalWrite(10, 1); digitalWrite(9, 0); digitalWrite(8, 0);
  delay(500);
  digitalWrite(13, 0); digitalWrite(12, 0); digitalWrite(11, 1); digitalWrite(10, 1); digitalWrite(9, 0); digitalWrite(8, 0);
  delay(500);
  digitalWrite(13, 0); digitalWrite(12, 1); digitalWrite(11, 0); digitalWrite(10, 0); digitalWrite(9, 1); digitalWrite(8, 0);
  delay(500);
  digitalWrite(13, 1); digitalWrite(12, 0); digitalWrite(11, 0); digitalWrite(10, 0); digitalWrite(9, 0); digitalWrite(8, 1);
  delay(500);
  digitalWrite(13, 0); digitalWrite(12, 0); digitalWrite(11, 0); digitalWrite(10, 0); digitalWrite(9, 0); digitalWrite(8, 0);
  delay(500);

}////end loop

void ltor() {
  int left = 13;
  while (left >= 8) {
    digitalWrite(left, 1);
    delay(500);
    digitalWrite(left, 0);
    delay(500);
    left = left - 1;
  }

}
void rtol(){
  int a = 8;
  while (a <= 13) {
    digitalWrite(a, 1);
    delay(500);
    digitalWrite(a, 0);
    delay(500);
    a = a + 1;

  }
}
void hled() {
  int b = 13;
  while (b >= 8) {
    digitalWrite(b, 1);
    b = b - 1;
  }
  delay(500); 



}
void lled() {
   int c = 13;
  while (c >= 8) {
    digitalWrite(c, 0);
    c = c - 1;
  }
  delay(500);

}