#define PIN_TRIG 3
#define PIN_ECHO 2
#define LED_pin 8

void setup() {
  Serial.begin(115200);
  pinMode(PIN_TRIG, OUTPUT);
  pinMode(PIN_ECHO, INPUT);
  pinMode(LED_pin,OUTPUT);
}
void loop() {
  // Start a new measurement:
  digitalWrite(PIN_TRIG, HIGH);
  delayMicroseconds(10);
  digitalWrite(PIN_TRIG, LOW);

  // Read the result:
  int duration = pulseIn(PIN_ECHO, HIGH);
  int distance= duration/58;
  
  if(distance<10){
      Serial.println("Warning, Obstacle ahead!");
      digitalWrite(LED_pin,HIGH);
  }
  else{
      Serial.println("Go Forward");
      digitalWrite(LED_pin,LOW);
  }
  delay(1000);
}