#include <AFMotor.h>                  // include the Adafruit Motor Lib. in our code.
AF_DCMotor motor(2, MOTOR12_64KHZ);   // Creats a Motor-Object ( port# 2, the Controlling-Signal-Speed).

void setup() {
  motor.setSpeed(200);     // sets the Motor-Speed ( its PWM Value: start from 0 upto 255)
}

void loop() {
  motor.run(FORWARD);      // turn the Motor direction to  FORWARD
  delay(1000);             // delay specifiy the duration of the Motion
  motor.run(BACKWARD);     // turn the Motor direction to  BACKWARD
  delay(1000);  
  motor.run(RELEASE);      // Stops the Motor RELEASE
  delay(1000);
}