int latchPin = 3; // Pin Latch/RCLK 74HC595 ke D5
int clockPin = 4; // Pin Clock/SRCLK 74HC595 ke D6
int dataPin = 2; // Pin Data/SER 74HC595 ke D4
byte posisiLed[9] = {
  B00000000, //mati semua
  B10000000, //lampu 1
  B01000000, //lampu 2
  B00100000,
  B00010000, 
  B00001000, 
  B00000100, 
  B00000010, 
  B00000001 
};
byte data = 0;
void setup() {
  pinMode(latchPin, OUTPUT);
  pinMode(dataPin, OUTPUT);
  pinMode(clockPin, OUTPUT);
  Serial.begin(9600);
}
void loop() {
  for (int i = 0; i < 8; i++) {
    hidupkan_lampu(posisiLed[i]);
    Serial.print(posisiLed[i]);
  }
  for (int j = 8; j > 0; j--) {
    hidupkan_lampu(posisiLed[j]);
    Serial.print(posisiLed[j]);
  }
}

void shiftWrite(byte nmr, boolean nil) {
  bitWrite(data,nmr,nil);
  shiftOut(dataPin, clockPin, LSBFIRST, data); 
  digitalWrite(latchPin, HIGH); 
  digitalWrite(latchPin, LOW); 
  delay(500);
}
void hidupkan_lampu(byte pattern) {
  shiftOut(dataPin, clockPin, LSBFIRST, pattern); 
  digitalWrite(latchPin, HIGH); 
  digitalWrite(latchPin, LOW); 
  delay(500);
}