const int DataPin = 23; //Blue
const int ClockPin = 22; //Yellow
const int LatchPin = 21;  //Pink
int pattern = 0b1010100110101011;
void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  pinMode(DataPin,OUTPUT);
  pinMode(ClockPin,OUTPUT);
  pinMode(LatchPin,OUTPUT);

}
// https://lastminuteengineers.com/74hc595-shift-register-arduino-tutorial/?utm_content=cmp-true
// In this, the concept is explained as LatchPin change from Low to high will transfer the data
// Clock pin giving the value from low to high will trigger the clock pin

void shiftOutPattern(int dataPin, int clockPin, uint16_t pattern) {
  digitalWrite(LatchPin, LOW);
  for (int i = 0; i < 16; i++) {
    digitalWrite(dataPin, (pattern & (1 << i)) ? HIGH : LOW);
    digitalWrite(clockPin, HIGH);
    digitalWrite(clockPin, LOW);
  }
  digitalWrite(LatchPin, HIGH);
}

void loop() {

  Serial.println("pattern1");
  Serial.println(pattern);
  if( pattern & 1){
    pattern = 0b1010100110101010;
  }
    else{
    pattern = ~pattern;
  }
  shiftOutPattern(DataPin, ClockPin, pattern);
  delay(1000);

}