// Define pin numbers for stepper motor control
const int Aplus = 8;  // A+
const int Aminus = 9; // A-
const int Bplus = 10; // B+
const int Bminus = 11; // B-

// Step sequence for driving the stepper motor
int stepSequence[4][4] = {
  {1, 0, 1, 0}, // Step 1: A+ and B+
  {0, 1, 1, 0}, // Step 2: A- and B+
  {0, 1, 0, 1}, // Step 3: A- and B-
  {1, 0, 0, 1}  // Step 4: A+ and B-
};

void setup() {
  // Set motor control pins as outputs
  pinMode(Aplus, OUTPUT);
  pinMode(Aminus, OUTPUT);
  pinMode(Bplus, OUTPUT);
  pinMode(Bminus, OUTPUT);
}

void loop() {
  // Complete a full rotation (200 steps for 1.8° step angle motor)
  for (int i = 0; i < 200; i++) {
    stepMotor(i % 4); // modulo to loop through the 4-step sequence
    delay(10); // Adjust delay for speed control
  }

  delay(1000); // Pause before the next rotation
}

// Function to send signals to the stepper motor
void stepMotor(int step) {
  digitalWrite(Aplus, stepSequence[step][0]);
  digitalWrite(Aminus, stepSequence[step][1]);
  digitalWrite(Bplus, stepSequence[step][2]);
  digitalWrite(Bminus, stepSequence[step][3]);
}