const int trig = 9;  
const int echo = 10;

const int LED1 = 6;
const int buzzer = 7;

int duration = 0;
int distance = 0;

void setup()
{
  pinMode(trig , OUTPUT);
  pinMode(echo , INPUT);
 
  pinMode(LED1 , OUTPUT);
  pinMode(buzzer , OUTPUT);
  
 
  Serial.begin(9600);

}

void loop()
{
  digitalWrite(trig , HIGH);
  delayMicroseconds(1000);
  digitalWrite(trig , LOW);


  duration = pulseIn(echo , HIGH);
  distance = (duration/2) / 28.5 ;
  Serial.println(distance);
 

  if ( distance <= 5 )
  {
    digitalWrite(LED1, HIGH);
    digitalWrite(buzzer,HIGH);
  }
  else
  {
    digitalWrite(LED1, LOW);
    digitalWrite(buzzer,LOW);
  }
}