#define TRIGGER_PIN  2
#define ECHO_PIN     3

void setup() {
  pinMode(TRIGGER_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);
  Serial.begin(9600);
}

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

  long duration = pulseIn(ECHO_PIN, HIGH);
  int distance = duration * 0.0344 / 2;

  if (distance > 0 && distance < 200) {
    Serial.print("Distance: ");
    Serial.print(distance);
    Serial.print(" cm");

    if (distance <= 5) {
      Serial.println(" - Food Item 1");
    } else if (distance > 5 && distance <= 10) {
      Serial.println(" - Food Item 2");
    } else if (distance > 10 && distance <= 15) {
      Serial.println(" - Food Item 3");
    } else if (distance > 15 && distance <= 20) {
      Serial.println(" - Food Item 4");
    } else if (distance > 20 && distance <= 25) {
      Serial.println(" - Food Item 5");
    } else if (distance > 25 && distance <= 30) {
      Serial.println(" - Food Item 6");
    } else if (distance > 30 && distance <= 35) {
      Serial.println(" - Food Item 7");
    } else if (distance > 35 && distance <= 40) {
      Serial.println(" - Food Item 8");
    } else if (distance > 40 && distance <= 45) {
      Serial.println(" - Food Item 9");
    } else if (distance > 45 && distance <= 50) {
      Serial.println(" - Food Item 10");
    } else {
      Serial.println(" - Unknown Food Item");
    }
  } else {
    Serial.println("No food item detected");
  }

  delay(1000);
}