int datapin = 12; 
int clockpin = 27;
int latchpin = 14;

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);

  int pattern = 0b01010101;

  digitalWrite(latchpin, LOW);
  shiftOut(datapin, clockpin, LSBFIRST, pattern);
  digitalWrite(latchpin, HIGH);
  delay(500);
}

void loop() {
  // put your main code here, to run repeatedly:
  delay(10); // this speeds up the simulation
}