void left(){
analogWrite(ENA,carSpeed);
analogWrite(ENB,carSpeed);
digitalWrite(IN1,LOW);
digitalWrite(IN2,HIGH);
digitalWrite(IN3,LOW);
digitalWrite(IN4,HIGH);

Serial.println("goleft!");

}
void right(){
analogWrite(ENA,carSpeed);
analogWrite(ENB,carSpeed);
digitalWrite(IN1,HIGH);
digitalWrite(IN2,LOW);
digitalWrite(IN3,HIGH);
digitalWrite(IN4,LOW);
Serial.println("go right!");

}