// Pin definitions
#define DATA_PIN  D5  // DS
#define CLOCK_PIN D6  // SH_CP
#define LATCH_PIN D7  // ST_CP

void setup() {
  // Initialize pins
  pinMode(DATA_PIN, OUTPUT);
  pinMode(CLOCK_PIN, OUTPUT);
  pinMode(LATCH_PIN, OUTPUT);
}

void writeStep(byte stepByte){
  shiftOut(DATA_PIN, CLOCK_PIN, MSBFIRST, stepByte);
  digitalWrite(LATCH_PIN, HIGH);
  digitalWrite(LATCH_PIN, LOW);
  delayMicroseconds(800); //780 min
}

void loop() {
 writeStep(0b00010001);
 writeStep(0b00110011);
 writeStep(0b00100010);
 writeStep(0b01100110);
 writeStep(0b01000100);
 writeStep(0b11001100);
 writeStep(0b10001000);
 writeStep(0b10011001);
}