#include <Stepper.h>

const int stepsPerRevolution = 200;  

Stepper myStepper(stepsPerRevolution, 8, 9, 10, 11);

void setup() {

  myStepper.setSpeed(60);
 
}

void loop() {
  
  myStepper.step(50);
  delay(500);

  myStepper.step(50);
  delay(500);

  myStepper.step(-100);
  delay(500);

  myStepper.step(-100);
  delay(500);
}