const int dataPin1 = 5;   /* DS */
const int dataPin2 = 6;   /* DS */
const int clockPin = 3;  /* SHCP */
const int latchPin = 4;  /* STCP */

void setup() {
  pinMode(dataPin1, OUTPUT);
  pinMode(dataPin2, OUTPUT);
  pinMode(clockPin, OUTPUT);
  pinMode(latchPin, OUTPUT);
}

int pattern[] = {1,0,1,0,1,0,1,0};

int pattern1 = 0b10101010;
int pattern2 = 0b01010101;
void loop() {

  digitalWrite(latchPin, LOW);
  for (int i = 0; i < 8; i++){
    digitalWrite(clockPin, LOW);
    digitalWrite(dataPin1, pattern[i]);
    digitalWrite(clockPin, HIGH);
  }
  digitalWrite(latchPin, HIGH);

  // shiftOut(dataPin1, clockPin, LSBFIRST, pattern1);
  // shiftOut(dataPin2, clockPin, LSBFIRST, pattern2);
  // digitalWrite(latchPin, HIGH);
  delay(500);
  pattern1 = ~pattern1; // Invert the pattern
  pattern2 = ~pattern2; // Invert the pattern
  // Serial.println(digitalRead(dataPin1));
}

void writeCollum(int[] pattern, pin){

}