aurdino step motor ileri-geri kontrol

int ldrPin=A2; 
  int ldrDeger=0; 
  int esikDeger=300; // bunun yerine daha uygun bir belirleyebilirsiniz. 
  int delayTime = 50; 
  int motorPin1 = 8;           
  int motorPin2 = 9; 
  int motorPin3 = 10; 
  int motorPin4 = 11; 
   
  void setup(){ 
  Serial.begin(9600); 
  pinMode(13, OUTPUT); 
  pinMode(motorPin1, OUTPUT); 
  pinMode(motorPin2, OUTPUT); 
  pinMode(motorPin3, OUTPUT); 
  pinMode(motorPin4, OUTPUT); 
  } 
  void loop(){ 
    ldrDeger=analogRead(ldrPin); 
    if(ldrDeger>esikDeger){ 
       
   
  digitalWrite(13, HIGH); 
    digitalWrite(motorPin1, HIGH); 
    digitalWrite(motorPin2, LOW); 
    digitalWrite(motorPin3, LOW); 
    digitalWrite(motorPin4, LOW); 
    delay(delayTime); 
    digitalWrite(13, HIGH); 
    digitalWrite(motorPin1, LOW); 
    digitalWrite(motorPin2, HIGH); 
    digitalWrite(motorPin3, LOW); 
    digitalWrite(motorPin4, LOW); 
    delay(delayTime); 
    digitalWrite(13, HIGH); 
    digitalWrite(motorPin1, LOW); 
    digitalWrite(motorPin2, LOW); 
    digitalWrite(motorPin3, HIGH); 
    digitalWrite(motorPin4, LOW); 
    delay(delayTime); 
    digitalWrite(13, HIGH); 
    digitalWrite(motorPin1, LOW); 
    digitalWrite(motorPin2, LOW); 
    digitalWrite(motorPin3, LOW); 
    digitalWrite(motorPin4, HIGH); 
    delay(delayTime); 
   
  } 
  else 
  { 
    digitalWrite(13, LOW); 
    digitalWrite(motorPin4, HIGH); 
    digitalWrite(motorPin3, LOW); 
    digitalWrite(motorPin2, LOW); 
    digitalWrite(motorPin1, LOW); 
    delay(delayTime); 
    digitalWrite(motorPin4, LOW); 
    digitalWrite(motorPin3, HIGH); 
    digitalWrite(motorPin2, LOW); 
    digitalWrite(motorPin1, LOW); 
    delay(delayTime); 
    digitalWrite(motorPin4, LOW); 
    digitalWrite(motorPin3, LOW); 
    digitalWrite(motorPin2, HIGH); 
    digitalWrite(motorPin1, LOW); 
    delay(delayTime); 
    digitalWrite(motorPin4, LOW); 
    digitalWrite(motorPin3, LOW); 
    digitalWrite(motorPin2, LOW); 
    digitalWrite(motorPin1, HIGH); 
    delay(delayTime); 
  } 
  }