int trigger=19;
int echo=18;
int light=14;
int buzzer=26;

void setup() {
   Serial.begin(9600); // Start serial communication
  
  
  Serial.begin(115200);
  pinMode(trigger, OUTPUT);
  pinMode(echo, INPUT);
  pinMode(light, OUTPUT);
  pinMode(buzzer, OUTPUT);
}

int Ultra_sonic(){
  digitalWrite(trigger, HIGH);
  delay(100);
  digitalWrite(trigger, LOW);
 float recieved= pulseIn(echo, HIGH);
 float converted=(recieved*0.034/2)+1;
 return(converted);

}

void loop() {
  
  
  // put your main code here, to run repeatedly:
  int actual_distance=Ultra_sonic();
  Serial.println(actual_distance);
  delay(1000); 
  
  
if(actual_distance<=250);
digitalWrite(light, HIGH);
tone(buzzer,1000);


if(actual_distance>250);
digitalWrite(light, LOW);
noTone(buzzer);

}