#define stepPin 2
#define dirPin 3 
#define msi1 9
#define msi2 10
#define msi3 11

const int steps = 200;

enum State {
  INIT,
  MOVE_FORWARD,
  MOVE_BACKWARD,
  DELAY
};

State currentState = INIT;
unsigned long previousMillis = 0;
const long interval = 1000; // 1 second

void setup() {
  // Sets the pins as Outputs
  Serial.begin(115200);
  pinMode(stepPin,OUTPUT); 
  pinMode(dirPin,OUTPUT);
  pinMode(msi1,OUTPUT);
  pinMode(msi2,OUTPUT);
  pinMode(msi3,OUTPUT);

  digitalWrite(msi1,HIGH);
  digitalWrite(msi2,HIGH);
  digitalWrite(msi3,LOW);

  digitalWrite(dirPin, LOW);
  digitalWrite(stepPin, LOW);
}

void loop() {
  unsigned long currentMillis = millis();

  switch (currentState) {
    case INIT:
      digitalWrite(dirPin, LOW); // Enables the motor to move in a particular direction
      currentState = MOVE_BACKWARD;
      break;
     // In order to change the angle of rotation 
     // Microstepping 1/8 th == 0.225 degree per revolution
     // if 200 steps/rev == 1.8 degree per revolution 
     // 0.225 * 44.4444 = 9.9999 degrees 
    case MOVE_FORWARD:
      for(float x = 0; x < 44.44444; x++) {
        digitalWrite(stepPin, HIGH); 
        delayMicroseconds(50);    // Changing the time delay between steps changes the rotation speed
        digitalWrite(stepPin, LOW); 
        delayMicroseconds(50); 
        if (44.00 == x){
          Serial.println("1");
          // Serial.println(0.225*x);
        }
      }
      currentState = DELAY;
      previousMillis = currentMillis; // reset the delay timer
      break;

    case DELAY:
      if (currentMillis - previousMillis >= interval) {
        currentState = MOVE_BACKWARD;
      }
      break;

    case MOVE_BACKWARD:
      // digitalWrite(dirPin, LOW); // Enables the motor to move in the opposite direction
      for(float x = 0; x < 44.44444; x++) {
        digitalWrite(stepPin, HIGH); 
        delayMicroseconds(50);    // Changing the time delay between steps changes the rotation speed
        digitalWrite(stepPin, LOW); 
        delayMicroseconds(50); 
        if (44.00 == x){
          Serial.println("1");
        }
      }
      
      currentState = DELAY;
      previousMillis = currentMillis; // reset the delay timer
      break;
  }
}