#define STEPPER_DIR    6
#define STEPPER_STEP   7
#define STEPPER_EN    11

#define POTI          A1


// the setup function runs once when you press reset or power the board
void setup() {
  pinMode(POTI, INPUT);

  pinMode(STEPPER_STEP, OUTPUT);
  pinMode(STEPPER_DIR, OUTPUT);
  pinMode(STEPPER_EN, OUTPUT);
  digitalWrite(STEPPER_EN, 0);
}

// the loop function runs over and over again forever
void loop() {

  digitalWrite(STEPPER_DIR, LOW);
  for(int i = 0; i < 400; i++){
    digitalWrite(STEPPER_STEP, HIGH);
    delay(1);
    digitalWrite(STEPPER_STEP, LOW);
    delay(10);
  }
  delay(500);
  digitalWrite(STEPPER_DIR, HIGH);
  for(int i = 0; i < 400; i++){
    digitalWrite(STEPPER_STEP, HIGH);
    delay(1);
    digitalWrite(STEPPER_STEP, LOW);
    delay(10);
  }

  digitalWrite(STEPPER_DIR, LOW);
  while(analogRead(POTI) < 800 || analogRead(POTI) > 820){
    digitalWrite(STEPPER_STEP, HIGH);
    delay(1);
    digitalWrite(STEPPER_STEP, LOW);
    delay(5);
  }

  digitalWrite(STEPPER_DIR, HIGH);
  while(analogRead(POTI) < 100 || analogRead(POTI) > 120){
    digitalWrite(STEPPER_STEP, HIGH);
    delay(1);
    digitalWrite(STEPPER_STEP, LOW);
    delay(5);
  }

  delay(2000);
}