const int EN=2;         //ENABLE PIN
const int Step=3;       // STEP PIN
const int dir=4;        // DIRECTION PIN
/*----------------------------SETUP FUNCTION--------------------------*/
void setup() 
{
  pinMode(EN,OUTPUT);     // ENABLE AS OUTPUT
  pinMode(dir,OUTPUT);    // DIRECTION AS OUTPUT
  pinMode(Step,OUTPUT);   // STEP AS OUTPUT
  digitalWrite(EN,LOW);   // SET ENABLE TO LOW
}

/*----------------------------LOOP FUNCTION--------------------------*/
void loop() 
{
  digitalWrite(dir,LOW);        // SET DIRECTION LOW FOR FORWARD ROTATION
  for(int x = 0; x < 1000; x++) // LOOP 1000 TIMES FOR 1000 RISING EDGE ON STEP PIN
  {
    digitalWrite(Step,HIGH);    // STEP HIGH
    delay(1);                   // WAIT
    digitalWrite(Step,LOW);     // STEP LOW
    delay(1);                   // WAIT
  }
  delay(10);                    // DELAY BEFOR SWITCH DIRECTION
  digitalWrite(dir,HIGH);       // SET DIRECTION HIGH FOR BACKWARD ROTATION
  for(int x = 0; x < 1000; x++) // LOOP 1000 TIMES FOR 1000 RISING EDGE ON STEP PIN
  {
    digitalWrite(Step,HIGH);    // STEP HIGH
    delay(1);                   // WAIT
    digitalWrite(Step,LOW);     // STEP LOW
    delay(1);                   // WAIT
  }
  delay(1);                    // DELAY BEFOR SWITCH DIRECTION
}