const int dirPin = 3;
const int stepPin = 2;
const int stepsPerRevolution = 200;


void setup() {
  // put your setup code here, to run once:
pinMode(dirPin, OUTPUT);
pinMode(stepPin, OUTPUT);

}

void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite(dirPin, LOW);

  for(int x= 0; x < stepsPerRevolution; x++)
  {
    digitalWrite(stepPin, HIGH);
    delayMicroseconds(2000);
    digitalWrite(stepPin, LOW);
    delayMicroseconds(2000);
  } 
  delay(100);
}