const int dirPin = 8;
const int stepPin = 9;
const int steps90 = 50;  // 90 derajat
const int steps180 = 100; // 180 derajat

void setup() {
  pinMode(dirPin, OUTPUT);
  pinMode(stepPin, OUTPUT);
}

void loop() {
  // 2x putar 90 derajat ke kanan
  for (int i = 0; i < 2; i++) {
    digitalWrite(dirPin, HIGH);  // Arah kanan
    stepMotor(steps90);
  }

  // 2x putar 180 derajat ke kiri
  for (int i = 0; i < 2; i++) {
    digitalWrite(dirPin, LOW);   // Arah kiri
    stepMotor(steps180);
  }
}

// Fungsi untuk memutar motor sejumlah langkah
void stepMotor(int steps) {
  for (int i = 0; i < steps; i++) {
    digitalWrite(stepPin, HIGH);
    delayMicroseconds(20);
    digitalWrite(stepPin, LOW);
    delay(10);
  }
}