// Import the required library to setup the LCD

#define TRIG_PIN 18
#define ECHO_PIN 19
#define RED_LED 32
#define GREEN_LED 33

// Setup the LCD


void setup() {
  Serial.begin(115200);
  pinMode(TRIG_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);

  pinMode(RED_LED, OUTPUT);
  pinMode(GREEN_LED, OUTPUT);

  // Initilize the display and display the intial message
  
}

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

  
  int duration = pulseIn(ECHO_PIN, HIGH);
  int distance = duration * 0.034 / 2;

  if(distance > 50){
    digitalWrite(GREEN_LED, HIGH);
    digitalWrite(RED_LED, LOW);

  }else{
    digitalWrite(RED_LED, HIGH);
    digitalWrite(GREEN_LED, LOW);
  }


  // Display the distance
  

  // Wait for a moment before the next reading
 
}