#include <Stepper.h> 
 
// change the steps variable to the number of steps on your motor 
int steps = 100; 
 
// create and attaches a stepper motor 
// with 100 steps to pins 0, 1, 2 and 3 
 
Stepper stepper(steps, 0, 1, 2, 3); 
 
 
void setup() 
{ 
  // set the speed of the motor to 20 rpms 
  stepper.setSpeed(20); 
} 
 
void loop() 
{ 
  // move 20 steps forward 
  stepper.step(20); 
 
  // move 20 steps backwards 
  stepper.step(-20); 
}