int dirpin = 5;
int steppin = 3;
int buttonPin = 2;     // the number of the pushbutton pin
int direction = LOW;


void setup() {
  pinMode(dirpin, OUTPUT);
  pinMode(steppin, OUTPUT);
  pinMode(buttonPin, INPUT);
}


void loop(){
  int buttonState = 0;         // variable for reading the pushbutton status
  int i;
  int j;

  buttonState = digitalRead(buttonPin);

  // check if the pushbutton is pressed.
  // if it is, the buttonState is HIGH:
  if (buttonState == HIGH) {
    digitalWrite(dirpin, LOW);     // Set the direction.

for(i=0; i<90; i++){
  if(direction == 0){
  for (j = 0; j<30; j++)       // Iterate for 4000 microsteps.
  {
    digitalWrite(dirpin, LOW);
    digitalWrite(steppin, LOW);  // This LOW to HIGH change is what creates the
    digitalWrite(steppin, HIGH); // "Rising Edge" so the easydriver knows to when to step.
    delayMicroseconds(500);      // This delay time is close to top speed for this
  }
    for (j = 0; j<50; j++)       // Iterate for 4000 microsteps.
  {
    digitalWrite(dirpin, HIGH);
    digitalWrite(steppin, LOW);  // This LOW to HIGH change is what creates the
    digitalWrite(steppin, HIGH); // "Rising Edge" so the easydriver knows to when to step.
    delayMicroseconds(500);      // This delay time is close to top speed for this
  }

  }
  if(direction == 1){
    for (j = 0; j<30; j++)       // Iterate for 4000 microsteps.
  {
    digitalWrite(dirpin, HIGH);
    digitalWrite(steppin, LOW);  // This LOW to HIGH change is what creates the
    digitalWrite(steppin, HIGH); // "Rising Edge" so the easydriver knows to when to step.
    delayMicroseconds(500);      // This delay time is close to top speed for this
  }
    for (j = 0; j<50; j++)       // Iterate for 4000 microsteps.
  {
    digitalWrite(dirpin, LOW);
    digitalWrite(steppin, LOW);  // This LOW to HIGH change is what creates the
    digitalWrite(steppin, HIGH); // "Rising Edge" so the easydriver knows to when to step.
    delayMicroseconds(500);      // This delay time is close to top speed for this
  }
  }



}
  if(direction==0){
    direction = 1;
  }else{
    direction = 0;
  }

  }
}