const int trigPin1 = 27;
const int echoPin1 = 26;

const int trigPin2 = 2;
const int echoPin2 = 15;

const int trigPin3 = 18;
const int echoPin3 = 5;

const int ledPin1 = 13;
const int ledPin2 = 12;
const int ledPin3 = 14;

long duration;
int distance;

void setup () {
  pinMode(trigPin1, OUTPUT);
  pinMode(echoPin1, INPUT);

  pinMode(trigPin2, OUTPUT);
  pinMode(echoPin2, INPUT);

  pinMode(trigPin3, OUTPUT);
  pinMode(echoPin3, INPUT);

   pinMode(ledPin1, OUTPUT);
   pinMode(ledPin2, OUTPUT);
   pinMode(ledPin3, OUTPUT);

  Serial.begin(9600);
}
void loop() {
  digitalWrite(trigPin1, LOW);
  delayMicroseconds(2);

  digitalWrite(trigPin1, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin1, LOW);

  duration = pulseIn(echoPin1, HIGH);

  distance = duration * 0.034 / 2;

if (distance < 200) {
  digitalWrite(ledPin1, LOW);
  Serial.println("Parking Space 1 : Occupied");
}else {
  digitalWrite(ledPin1, HIGH);
  Serial.println("Parking Space1 : Vacant");
}
delay(1000);

  Serial.print("Distance");
  Serial.println(distance);

   digitalWrite(trigPin2, LOW);
  delayMicroseconds(2);

  digitalWrite(trigPin2, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin2, LOW);

  duration = pulseIn(echoPin2, HIGH);

  distance = duration * 0.034 / 2;

if (distance < 200) {
  digitalWrite(ledPin2, LOW);
  Serial.println("Parking Space 2 : Occupied");
}else {
  digitalWrite(ledPin2, HIGH);
  Serial.println("Parking Space2 : Vacant");
}
delay(1000);

  Serial.print("Distance");
  Serial.println(distance);

   digitalWrite(trigPin3, LOW);
  delayMicroseconds(2);

  digitalWrite(trigPin3, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin3, LOW);

  duration = pulseIn(echoPin3, HIGH);

  distance = duration * 0.034 / 2;

if (distance < 200) {
  digitalWrite(ledPin3, LOW);
  Serial.println("Parking Space 3 : Occupied");
}else {
  digitalWrite(ledPin3, HIGH);
  Serial.println("Parking Space3 : Vacant");
}
delay(1000);

  Serial.print("Distance");
  Serial.println(distance);
}