#include <Servo.h>

Servo lidServo;
int trigPin = 8;
int echoPin = 9;
long duration;
int distance;
int lidAngle = 0;

void setup() {
  Serial.begin(9600);
  lidServo.attach(10);
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
}

void loop() {
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);
  
  duration = pulseIn(echoPin, HIGH);
  distance = duration * 0.034 / 2;

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

  if (distance < 20) {
    openLid();
    delay(5000); // Keep the lid open for 5 seconds
    closeLid();
  }
}

void openLid() {
  lidServo.write(90); // Open the lid (adjust the angle as needed)
}

void closeLid() {
  lidServo.write(0); // Close the lid
}