#include <Stepper.h>
const int stepsPerRevolution = 200; 
Stepper myStepper(stepsPerRevolution, 8, 9, 10, 11);
void setup() {
myStepper.setSpeed(50);
Serial.begin(9600);
}
void loop() {
Serial.println("clockwise");
myStepper.step(stepsPerRevolution);
delay(500);
Serial.println("counterclockwise");
myStepper.step(-stepsPerRevolution);
delay(500);
}