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int pinffwd = A0;
int pinbckwd = A1;
int pinright = A2;
int pinleft = A3;

void setup(){
  Serial.begin(9600);
  // use this only if you are on an Arduino Uno or sonething similar
  // and you are using the 3.3V Pin to power the rc-car
  // you also need to connect the AREF pin to the 3.3V pin
  analogReference(EXTERNAL);
}

void loop(){
  int left = analogRead(pinleft);
  int right = analogRead(pinright);
  int ffwd = analogRead(pinffwd);
  int bckwd = analogRead(pinbckwd);

  delay(100);

  if(left < 100){
    Serial.println("left");
  }

  if(right < 100){
    Serial.println("right");
  }
  if(ffwd < 100){
    Serial.println("ffwd");
  }
  if(bckwd < 100){
    Serial.println("backwd");
  }

}