Shift Register Cluster - 24 LED Array

const int SER = 8; // Serial Output to Shift Register
const int LATCH = 9; // Shift Register Latch Pin
const int CLK = 10; // Shift Register Clock Pin

int seq1[]={1,2,4,8,16,32,64,128,64,32,16,8,4,2,1,0};

int seq2[]={1,3,7,15,31,63,127,255,127,63,31,15,7,3,1,0};

int seq3[]={24,36,66,129,66,36,24,0};

int randy;

const int x = 500;

void setup() {
  // put your setup code here, to run once:

pinMode(SER, OUTPUT);
pinMode(LATCH, OUTPUT);
pinMode(CLK, OUTPUT);
digitalWrite(LATCH, LOW);
shiftOut(SER, CLK, MSBFIRST, B11111111);
shiftOut(SER, CLK, MSBFIRST, B11111111);
shiftOut(SER, CLK, MSBFIRST, B11111111);
digitalWrite(LATCH,HIGH);


}
void blinking(){
digitalWrite(LATCH, LOW);
shiftOut(SER, CLK, MSBFIRST, B10101010);
digitalWrite(LATCH,HIGH);
delay(x);


digitalWrite(LATCH, LOW);
shiftOut(SER, CLK, MSBFIRST, B01010101);
digitalWrite(LATCH,HIGH);
delay(x);

}
void rider(){
for(int i=0; i<16; i++)
{
digitalWrite(LATCH, LOW);
shiftOut(SER, CLK, MSBFIRST, seq1[i]);
digitalWrite(LATCH,HIGH);
delay(x);
}
}
void bar(){

for(int i=0; i<16; i++)
{
digitalWrite(LATCH, LOW);
shiftOut(SER, CLK, MSBFIRST, seq2[i]);
digitalWrite(LATCH,HIGH);
delay(x);
}
}
void center(){
  for(int i=0; i<16; i++)
{
digitalWrite(LATCH, LOW);
shiftOut(SER, CLK, MSBFIRST, seq3[i]);
digitalWrite(LATCH,HIGH);
delay(x);
}
}
void twos(){
digitalWrite(LATCH, LOW);
shiftOut(SER, CLK, MSBFIRST, B11000000);
digitalWrite(LATCH,HIGH);
delay(x);


digitalWrite(LATCH, LOW);
shiftOut(SER, CLK, MSBFIRST, B00110000);
digitalWrite(LATCH,HIGH);
delay(x);

digitalWrite(LATCH, LOW);
shiftOut(SER, CLK, MSBFIRST, B00001100);
digitalWrite(LATCH,HIGH);
delay(x);

digitalWrite(LATCH, LOW);
shiftOut(SER, CLK, MSBFIRST, B00000011);
digitalWrite(LATCH,HIGH);
delay(x);


}
void loop() {
  // put your main code here, to run repeatedly:
randy = random(1,6);
switch (randy)
{
  case 1:
  rider();
  break;
  case 2:
  bar();
  break;
  case 3:
  center();
  break;
  case 4:
  blinking();
  break;
  case 5:
  twos();
  break;
}

}