connecting 5 shift registers

/*
 * Manvi Mittal
 * 5 shift registers
 */

const int ser = 17;
const int latch = 18;
const int clk = 19;

int lights [7] = {2, 4, 8, 16, 32, 64, 128};
int bar [7] = {3, 7, 15, 31, 63, 127, 255};

void setup() {
  // put your setup code here, to run once:
  pinMode (ser, OUTPUT);
  pinMode (latch, OUTPUT);
  pinMode (clk, OUTPUT);

  lightUp (B11111111, B11111111, B11111111, B11111111, B11111111); // scroll down for lightUp function
  delay (100);

}

void loop()
{
  // put your main code here, to run repeatedly:

  for (int i = 0; i < 7; i++)
  {
   lightUp (lights[i], B0000000, B0000000, B0000000, B0000000);
   delay (100);
  }

  for (int i = 0; i < 7; i++)
  {
   lightUp (B0000000, lights[i], B0000000, B0000000, B0000000);
   delay (100);
  }

  for (int i = 0; i < 7; i++)
  {
   lightUp (B0000000, B0000000, lights[i], B0000000, B0000000);
   delay (100);
  }

  for (int i = 0; i < 7; i++)
  {
   lightUp (B0000000, B0000000, B0000000, lights[i], B0000000);
   delay (100);
  }

  for (int i = 0; i < 7; i++)
  {
   lightUp (B0000000, B0000000, B0000000, B0000000, lights[i]);
   delay (100);
  }

  for (int i = 0; i < 7; i++)
  {
   lightUp (bar[i], B0000000, B0000000, B0000000, B0000000);
   delay (100);
  }

  for (int i = 0; i < 7; i++)
  {
   lightUp (B11111111, bar[i], B0000000, B0000000, B0000000);
   delay (100);
  }

  for (int i = 0; i < 7; i++)
  {
   lightUp (B11111111, B11111111, bar[i], B0000000, B0000000);
   delay (100);
  }

  for (int i = 0; i < 7; i++)
  {
   lightUp (B11111111, B11111111, B11111111, bar[i], B0000000);
   delay (100);
  }

  for (int i = 0; i < 7; i++)
  {
   lightUp (B11111111, B11111111, B11111111, B11111111, bar[i]);
   delay (100);
  }

  for (int i = 0; i < 66; i++)
  {
    lightUp (random (2, 255), random (2, 255), random (2, 255), random (2, 255), random (2, 255));
    delay (100);
  }


}

void lightUp (int byte1, int byte2, int byte3, int byte4, int byte5)
{
  digitalWrite (latch, LOW);
  shiftOut (ser, clk, MSBFIRST, byte1);
  shiftOut (ser, clk, MSBFIRST, byte2);
  shiftOut (ser, clk, MSBFIRST, byte3);
  shiftOut (ser, clk, MSBFIRST, byte4);
  shiftOut (ser, clk, MSBFIRST, byte5);
  digitalWrite (latch, HIGH);
}