// Define control pins for stepper motor
#define STEP_PIN 16
#define DIR_PIN 17

// Number of steps per one full revolution
const int stepsPerRevolution = 200;

void setup() {
  // Set the step and direction pins as outputs
  pinMode(STEP_PIN, OUTPUT);
  pinMode(DIR_PIN, OUTPUT);

  // Set initial direction to clockwise
  digitalWrite(DIR_PIN, HIGH);
}

void loop() {
  // Rotate motor clockwise
  for (int i = 0; i < stepsPerRevolution; i++) {
    digitalWrite(STEP_PIN, HIGH);       // Step HIGH
    delayMicroseconds(1000);            // Control speed
    digitalWrite(STEP_PIN, LOW);        // Step LOW
    delayMicroseconds(1000);
  }

  delay(1000);  // Wait 1 second

  // Change direction to counter-clockwise
  digitalWrite(DIR_PIN, LOW);

  // Rotate motor counter-clockwise
  for (int i = 0; i < stepsPerRevolution; i++) {
    digitalWrite(STEP_PIN, HIGH);       // Step HIGH
    delayMicroseconds(1000);            // Control speed
    digitalWrite(STEP_PIN, LOW);        // Step LOW
    delayMicroseconds(1000);
  }

  delay(1000);  // Wait 1 second before repeating
}