#define trigerPin 12
#define echoPin 13
#define ledPin 2
#define speakerPin 10
#define  pitch  262
double duration,distance;
void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  pinMode(trigerPin, OUTPUT);
  pinMode(echoPin, INPUT);

  pinMode(ledPin, OUTPUT);

  pinMode(speakerPin, OUTPUT);
}

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

  digitalWrite(trigerPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigerPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigerPin, LOW);
  delayMicroseconds(2);

  duration = pulseIn(echoPin,HIGH);

  distance = (duration/2)* 0.0343;

  if(distance<200){
    digitalWrite(ledPin,pitch);
    tone(speakerPin,pitch);
    delay(300);

    digitalWrite(ledPin, LOW);
    noTone(speakerPin);
    delay(300);
  }
  else{
    digitalWrite(ledPin, LOW);
    noTone(speakerPin);

  }
}