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