#include <Stepper.h>

const int stepsPerRevolution = 200;
Stepper myStepper(stepsPerRevolution, 8, 9, 10, 11);

void setup() {

  myStepper.setSpeed(60);
  Serial.begin(9600);
}

void loop() {

  Serial.println("Sentido \"horario\"");
  myStepper.step(stepsPerRevolution);
  delay(500);

  Serial.println("Sentido \"antihorario\"");
  myStepper.step(-stepsPerRevolution);
  delay(500);
}