const int DIR = 4;
const int STEP = 3;
const int steps_per_rev=200;

void setup() {
Serial.begin(115200);
pinMode(STEP,OUTPUT);
pinMode(DIR,OUTPUT);

}

void loop() {
 digitalWrite(DIR,HIGH);
 Serial.println("Spinning Clockwise...");

 for(int i=0;i<steps_per_rev;i++)
 {
  digitalWrite(STEP,HIGH);
  delayMicroseconds(2000);
  digitalWrite(STEP,LOW);
  delayMicroseconds(2000);
 }
delay(1000);

 digitalWrite(DIR,LOW);
 Serial.println("Spinning Anti-Clockwise...");

  for(int i=0;i<steps_per_rev;i++)
 {
  digitalWrite(STEP,HIGH);
  delayMicroseconds(1000);
  digitalWrite(STEP,LOW);
  delayMicroseconds(1000);
 }
 delay(1000);
}