int trig=13;
int echo=12;
float d;
void setup()
{
  Serial.begin(115200);
pinMode(trig, OUTPUT);
pinMode(echo, INPUT);
pinMode(22, OUTPUT);
pinMode(2, INPUT);
}
int ultrasonic()
{
  digitalWrite(trig, LOW);
  delay(10);
  digitalWrite(trig, HIGH);
  delay(150);
  digitalWrite(trig, LOW);
  d=pulseIn(echo,HIGH);
  return(d*0.034/2)+1;
  delay(1000);
}
void loop()
{
  
  if(ultrasonic()>200 && ultrasonic()<300)
  {
  digitalWrite(22, HIGH);
  delay(500);
 tone(2,1500);
 noTone(2);
  }
  else
  {
 digitalWrite(22, LOW);

}
Serial.println(String(ultrasonic()));
}