const int trigPins[] = {2, 4, 6}; // Array of Trig pins for ultrasonic sensors
const int echoPins[] = {3, 5, 7}; // Array of Echo pins for ultrasonic sensors
const int ledPins[] = {8, 9, 10}; // Array of LED pins

void setup() {
  Serial.begin(9600);
  
  for (int i = 0; i < 3; i++) {
    pinMode(trigPins[i], OUTPUT);
    pinMode(echoPins[i], INPUT);
    pinMode(ledPins[i], OUTPUT);
  }
}

void loop() {
  for (int i = 0; i < 3; i++) {
    // Trigger the ultrasonic sensor
    digitalWrite(trigPins[i], LOW);
    delayMicroseconds(2);
    digitalWrite(trigPins[i], HIGH);
    delayMicroseconds(10);
    digitalWrite(trigPins[i], LOW);

    // Read the distance
    long duration = pulseIn(echoPins[i], HIGH);
    int distance = duration * 0.034 / 2;

    // Adjust LED based on distance
    if (distance > 100) {
      // If the object is far, blink the LED
      blinkLED(ledPins[i]);
    } else {
      // If the object is near, turn on the LED solid
      digitalWrite(ledPins[i], HIGH);
    }

    // Print distance to serial monitor
    Serial.print("Sensor ");
    Serial.print(i + 1);
    Serial.print(" - Distance: ");
    Serial.print(distance);
    Serial.println(" cm");

    delay(1000); // Adjust the delay as needed
  }
}

void blinkLED(int pin) {
  // Blink the LED by turning it on and off quickly
  digitalWrite(pin, HIGH);
  delay(200);
  digitalWrite(pin, LOW);
  delay(200);
}