Social Distancing

const int trigPin = 9;
const int echoPin = 8;
const int buzzer = 6;
const int ledPin = 13;// defines variableslong duration;
int distance;
int safetyDistance;
int duration;
void setup() {
pinMode(trigPin, OUTPUT); // Sets the trigPin as an Output
pinMode(echoPin, INPUT); // Sets the echoPin as an Input
pinMode(buzzer, OUTPUT);
pinMode(ledPin, OUTPUT);
Serial.begin(9600); // Starts the serial communication
}
void loop() {// Clears the trigPin
digitalWrite(trigPin, LOW);
delayMicroseconds(2);// Sets the trigPin on HIGH state for 10 micro seconds
digitalWrite(trigPin, HIGH);
delayMicroseconds(10);
digitalWrite(trigPin, LOW);
// Reads the echoPin, returns the sound wave travel time in microseconds
duration = pulseIn(echoPin, HIGH);// Calculating the distance
distance= duration*0.034/2;
safetyDistance = distance;
if (safetyDistance <= 80)
{ digitalWrite(buzzer, HIGH);
digitalWrite(ledPin, HIGH);
}
else{
digitalWrite(buzzer, LOW);
digitalWrite(ledPin, LOW);
}// Prints the distance on the Serial Monitor
Serial.print("Distance: ");
Serial.println(distance);}