我需要一个arduino小车代码

这是一个基础的Arduino小车代码，可以让小车前进、后退、左转、右转。

//定义马达控制引脚
int motor1Pin1 = 2;
int motor1Pin2 = 3;
int motor2Pin1 = 4;
int motor2Pin2 = 5;

void setup() {
  //设置马达控制引脚为输出模式
  pinMode(motor1Pin1, OUTPUT);
  pinMode(motor1Pin2, OUTPUT);
  pinMode(motor2Pin1, OUTPUT);
  pinMode(motor2Pin2, OUTPUT);
}

void loop() {
  //向前走
  moveForward();
  delay(2000);
  
  //向后走
  moveBackward();
  delay(2000);
  
  //左转
  turnLeft();
  delay(2000);
  
  //右转
  turnRight();
  delay(2000);
}

//向前走
void moveForward() {
  digitalWrite(motor1Pin1, HIGH);
  digitalWrite(motor1Pin2, LOW);
  digitalWrite(motor2Pin1, HIGH);
  digitalWrite(motor2Pin2, LOW);
}

//向后走
void moveBackward() {
  digitalWrite(motor1Pin1, LOW);
  digitalWrite(motor1Pin2, HIGH);
  digitalWrite(motor2Pin1, LOW);
  digitalWrite(motor2Pin2, HIGH);
}

//左转
void turnLeft() {
  digitalWrite(motor1Pin1, LOW);
  digitalWrite(motor1Pin2, HIGH);
  digitalWrite(motor2Pin1, HIGH);
  digitalWrite(motor2Pin2, LOW);
}

//右转
void turnRight() {
  digitalWrite(motor1Pin1, HIGH);
  digitalWrite(motor1Pin2, LOW);
  digitalWrite(motor2Pin1, LOW);
  digitalWrite(motor2Pin2, HIGH);
}

注意：这只是一个基础的代码示例，实际运行时需要根据具体的小车硬件进行调整。