void left(){
analogWrite(ENA,carSpeed);
digitalrWrite(ENB;carSpeed);
digitalWrite(IN1,low);
digitalWrite(IN2,high);
digitaWrite(IN3,low);
digitalWrite(IN4,high);
serial.printIn("go left!")}
void left(){
analogWrite(ENA,carSpeed);
digitalrWrite(ENB;carSpeed);
digitalWrite(IN1,low);
digitalWrite(IN2,high);
digitaWrite(IN3,low);
digitalWrite(IN4,high);
digitalWrite(IN4,high);
serial.printIn("go right!");
}