bart

static int RIGHT_F = 13;
static int RIGHT_B = 12;
static int LEFT_F = 8;
static int LEFT_B = 9;

void setup()
{
  PinMode(RIGHT_F, output);
  PinMode(RIGHT_B, output);
  PinMode(LEFT_F, output);
  PinMode(LEFT_F, output);
}

void forward()
{
  digitalWrite(RIGHT_F, HIGH);
  digitalWrite(LEFT_F, HIGH);
}

void backward()
{
  digitalWrite(RIGHT_B, HIGH);
  digitalWrite(LEFT_B, HIGH);
}

void left()
{
  digitalWrite(RIGHT_F, HIGH);
  digitalWrite(LEFT_B, HIGH);

}

void right()
{
  digitalWrite(RIGHT_B, HIGH);
  digitalWrite(LEFT_F, HIGH);
}

void stop()
{
  digitalWrite(RIGHT_F, LOW);
  digitalWrite(RIGHT_B, LOW);
  digitalWrite(LEFT_F, LOW);
  digitalWrite(LEFT_B, LOW);
}

void loop()
{
  forward();
  delay(2500);
  stop();
  backward();
  delay(2500);
  stop();
  left();
  delay(2500);
  stop();
  right();
  delay(2500);
}