int latchPin = 5;
int clockPin = 6;
int dataPin = 4;

void setup() {
  pinMode(dataPin, OUTPUT);
  pinMode(latchPin, OUTPUT);
  pinMode(clockPin, OUTPUT);
}
byte data[] = {
  B10101010,
  B01010101,
  B00000000,
  B11111111
};
void loop() {
  ShiftReg(data[0]);
  ShiftReg(data[1]);
  ShiftReg(data[2]);
  ShiftReg(data[3]);
  
  //shiftOut(dataPin, clockPin, LSBFIRST, data[0]); 
  //digitalWrite(latchPin, HIGH);
  //digitalWrite(latchPin, LOW);
  //delay(500);
}
void ShiftReg(byte lampu) {
  shiftOut(dataPin, clockPin, LSBFIRST, lampu); 
  digitalWrite(latchPin, HIGH); 
  digitalWrite(latchPin, LOW); 
  delay(500);
}