Stepping motor

#include <Stepper.h>
#define STEPS 200

Stepper stepper(STEPS, 11, 10, 9, 8);

void setup()
{
stepper.setSpeed(140);
}

void loop()
{
stepper.step(100);
delay(1000);
stepper.step(-100);
delay(1000);
stepper.step(200);
delay(1000);
stepper.step(-200);
delay(1000);
stepper.step(300);
delay(1000);
stepper.step(-300);
delay(1000);
stepper.step(1600);
delay(1000);
stepper.step(-1600);
delay(1000);
}