const int proxSensor=2;
void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  pinMode(13,OUTPUT);
  pinMode(proxSensor,INPUT);

}

void loop() {
  // put your main code here, to run repeatedly:

if(digitalRead(proxSensor)==HIGH)
{
  digitalWrite(13,HIGH);
  Serial.println("Stop something is ahead");

}
else{
  digitalWrite(13,LOW);
  Serial.println("Nothing is there ,you can move ahead");
}
}