static int step = 4;
static int dir = 3;
static int button = 7;
static int button2 = 6;

void setup() {
  Serial.begin(9600);
  pinMode(step, OUTPUT);
  pinMode(dir, OUTPUT);
  pinMode(button, INPUT);
  pinMode(button2, INPUT);
}

void loop() {
  int zasuk = 113;

  if (digitalRead(button) == 1) {

    digitalWrite(dir, HIGH);

    for (int i = 0; i < zasuk; i++) {
      korak();
      delay(10);
    }
    delay(500);
  }

  if (digitalRead(button2) == 1) {

    digitalWrite(dir, LOW);

    for (int i = 0; i < zasuk; i++) {
      korak();
      delay(10);

      delay(500);
    }
  }
  void korak() {
    digitalWrite(step, HIGH);
    delayMicroseconds(10);
    digitalWrite(step, LOW);
    delayMicroseconds(10);
  }
}