Arduino motor shield example

AFMotor_Example.c

#include "AFMotor.h";

AF_DCMotor motor(2, MOTOR12_64KHZ); // create motor #2, 64KHz pwm

void setup() {
  Serial.begin(9600); // set up Serial library at 9600 bps
  Serial.println("Motor test!");

  motor.setSpeed(200); // set the speed to 200/255
}

void loop() {
  Serial.print("tick");
  motor.run(FORWARD); // turn it on going forward
  delay(1000);

  Serial.print("tock");
  motor.run(BACKWARD); // the other way
  delay(1000);

  Serial.print("tack");
  motor.run(RELEASE); // stopped
  delay(1000);
}