#include <Stepper.h>
int stepsPerRev = 2038;

Stepper St1 = Stepper(stepsPerRev, 8, 10, 9, 11);

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
}

void loop() {
  // put your main code here, to run repeatedly:
 Serial.println("Rotating clk-wise at 5 rpm");
 St1.setSpeed(5);
 St1.step(stepsPerRev);
 delay(1000);
 Serial.println("Rotating anti-clk-wise at 10 rpm");
 St1.setSpeed(10);
 St1.step(-stepsPerRev);
 delay(1000);
}