arduino stepper test for pololu break out board

/*
stepper test sketch for pololu stepper driver board.

connect enable pin to arduino pin 10
connect step pin to arduino pin 9
connect direction pin to arduino pin 8

The sketch lights led13 and runs the stepper 400 steps in one direction
then it waits on second, then turns off the led13 and runs the stepper 400 steps in the other direction
It waits another second then repeats the 400 one way 400 the other way.
 */

int ledPin =  13;    // LED connected to digital pin 13
int enx = 10;
int stepx = 9;
int dirx = 8;

// The setup() method runs once, when the sketch starts

void setup()   {
  // initialize the digital pin as an output:
  pinMode(ledPin, OUTPUT);
  pinMode(enx, OUTPUT);
  pinMode(stepx, OUTPUT);
  pinMode(dirx, OUTPUT);
  digitalWrite(enx, HIGH);
  digitalWrite(stepx, LOW);
  digitalWrite(dirx, LOW);

}

// the loop() method runs over and over again,
// as long as the Arduino has power

void loop()
{
  digitalWrite(enx, LOW);
  digitalWrite(dirx, HIGH);
  digitalWrite(ledPin, HIGH);   // set the LED on
for (int x = 0; x<400; x++){
  digitalWrite(stepx, HIGH);
  delay(1);
  digitalWrite(stepx, LOW);
//  delay(1);
}

  delay(1000);     // wait for a second
  digitalWrite(ledPin, LOW);    // set the LED off
  digitalWrite(dirx, LOW);
for (int x = 0; x<400; x++){
  digitalWrite(stepx, HIGH);
  delay(1);
  digitalWrite(stepx, LOW);
//  delay(1);
}
  digitalWrite(enx, HIGH);
  delay(1000);                  // wait for a second
}