const int ledPin = 26; 
const int ledPins = 17; 
const int ledPinss = 27; 
const int trigPin = 5; 
const int echoPin = 18; 

void setup() {
  pinMode(ledPin, OUTPUT); 
  pinMode(ledPins, OUTPUT); 
  pinMode(ledPinss, OUTPUT); 

  pinMode(trigPin, OUTPUT); 
  pinMode(echoPin, INPUT);  
  Serial.begin(9600);      
}

void loop() {
  digitalWrite(trigPin, LOW); 
  delayMicroseconds(2);       
  digitalWrite(trigPin, HIGH); 
  delayMicroseconds(10);      
  digitalWrite(trigPin, LOW); 

  long duration = pulseIn(echoPin, HIGH);
  float distance = (duration / 2.0) * 0.0344; 

  // Show the distance in Serial Monitor
  Serial.print("distance: ");
  Serial.print(distance);
  Serial.println(" cm");

  // Control the LED based on the distance
  if (distance < 120) {       // if distance is less than 120 cm
    digitalWrite(ledPin, HIGH); // turn on ledPin
    digitalWrite(ledPins, LOW);  
    digitalWrite(ledPinss, LOW);  
  } else if (distance >= 120 && distance < 320) { 
    // if distance is in between 120 cm and 320 cm
    digitalWrite(ledPin, LOW); 
    digitalWrite(ledPins, HIGH); // turn on ledPins
    digitalWrite(ledPinss, LOW); 
  } else {                    // If distance is more than 320 cm
    digitalWrite(ledPin, LOW);  
    digitalWrite(ledPins, LOW);  
    digitalWrite(ledPinss, HIGH); // turn on ledPinsss
  }
  delay(500); 
}