int Do=261;
int Re=294;
int Mi=329;
int Fa=349;
int Sol=392;
int La=440;
int Si=493;
int Do2=523;

void setup()
{
  pinMode(2, OUTPUT);//kled
  pinMode(3, OUTPUT);//mled
  
  pinMode(4, OUTPUT);//trig
  pinMode(5, INPUT);//echo
      pinMode(8, OUTPUT);//buzzer

  Serial.begin(9600);
}

void loop()
{
  digitalWrite(4,1);
  delay(1);
  digitalWrite(4,0);
  int sure=pulseIn(5,1);
  int mesafe=(sure/2)/28.97;
  Serial.println(mesafe);
  if(mesafe<200)
  {
    digitalWrite(2,1);
    digitalWrite(3,0);
    
    tone(8,Do);
    delay(1000);
    noTone(8);
    
    
    tone(8,Re);
    delay(1000);
    noTone(8);
  }
  else
  {
    digitalWrite(3,1);
    digitalWrite(2,0);
    
    tone(8,Mi);
    delay(1000);
    noTone(8);
    
    
    tone(8,Fa);
    delay(1000);
    noTone(8);
  }
    
  
}