#define clockPin A0
#define latchPin A1
#define data A2

void setup() {
  // put your setup code here, to run once:
  pinMode(clockPin, OUTPUT);
  pinMode(latchPin, OUTPUT);
  pinMode(data, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  pattern1();
  pattern2();
  pattern3();
}

void pattern1() {
  int pattern = 0;
  for (int i = 0; i < 8; i++) {
      pattern = (1<<i);
      digitalWrite(latchPin, LOW);
      shiftOut(data, clockPin, LSBFIRST, pattern);
      digitalWrite(latchPin, HIGH);
      delay(200);
  }
  for (int i = 7; i > 0; i--) {
      pattern = (1<<i);
      digitalWrite(latchPin, LOW);
      shiftOut(data, clockPin, LSBFIRST, pattern);
      digitalWrite(latchPin, HIGH);
      delay(200);
  }

}

void pattern2() {
  int pattern = 0;
  for (int i = 0; i < 8; i++) {
      pattern |= (1<<i);
      digitalWrite(latchPin, LOW);
      shiftOut(data, clockPin, LSBFIRST, pattern);
      digitalWrite(latchPin, HIGH);
      delay(200);
  }
  for (int i = 0; i < 8; i++) {
      pattern = (pattern<<i);
      digitalWrite(latchPin, LOW);
      shiftOut(data, clockPin, LSBFIRST, pattern);
      digitalWrite(latchPin, HIGH);
      delay(250);
  }

}

void pattern3() {
  int pattern = 0, pattern1 = 0;
  for (int i = 1; i < 8; i++) {
    for (int j = 0; j < 8-i; j++) {
      pattern = pattern1;
      pattern |= (1<<j);
      digitalWrite(latchPin, LOW);
      shiftOut(data, clockPin, LSBFIRST, pattern);
      digitalWrite(latchPin, HIGH);
      delay(200);
    }
    pattern1 |= (1<<8-i);
  }
  pattern = 0;
}