Programming the Shift Register and LED Circuit

/*
 * Jung Min Yean
 * Learning How to Use a Shift Register
 * 04/30/2019
 */

 const int Data = 8; // The output
 const int Latch = 9;
 const int Clock = 10; // Goes around the Shift Register
 int sequence[] = {0,1,2,4,8,16,32,64,128};
 int sequence2[] = {0,1,3,7,15,31,63,127,255};
 int sequence3[] = {255,127,63,31,15,7,3,1,0};

void setup()
{
  pinMode(Data, OUTPUT);
  pinMode(Latch, OUTPUT);
  pinMode(Clock, OUTPUT);

   digitalWrite(Latch, LOW);
  shiftOut(Data, Clock, MSBFIRST, B11111111); // B means Binary - 1 is on and 0 is off
  digitalWrite(Latch, HIGH);
  delay(200);

  digitalWrite(Latch, LOW);
  shiftOut(Data, Clock, MSBFIRST, B00000000); // B means Binary - 1 is on and 0 is off
  digitalWrite(Latch, HIGH);
  delay(200);
}
void lightUp()
{
  for(int i = 0; i < 8; i++)
    {
    digitalWrite(Latch, LOW);
    shiftOut(Data, Clock, MSBFIRST, sequence[i]);
    digitalWrite(Latch, HIGH);
    delay(200);
  }
}

void addingUp()
{
  for (int i = 0; i < 9; i++)
  {
    digitalWrite(Latch, LOW);
    shiftOut(Data, Clock, MSBFIRST, sequence2[i]);
    digitalWrite(Latch, HIGH);
    delay(200);
  }
}

void subtractingDown()
{
  for (int i = 0; i < 9; i++)
  {
    digitalWrite(Latch, LOW);
    shiftOut(Data, Clock, MSBFIRST, sequence3[i]);
    digitalWrite(Latch, HIGH);
    delay(200);
  }
}

void loop()
{
lightUp();
addingUp();
subtractingDown();
}