#include <Servo.h>
Servo servo;
long duration;
int distance;

int full=0;

void setup() {
  // put your setup code here, to run once:
  servo.attach(9);
Serial.begin(9600);
pinMode(4, OUTPUT); //LED
pinMode(10, OUTPUT); //trigger
pinMode(12, INPUT); //echo

}

void loop() {
  // put your main code here, to run repeatedly:
  int x=digitalRead(5);

  if(x==1){
    if(full == 0){
    Serial.println("opened");
    servo.write(0);
    delay(200);
    }
  }

else{
  Serial.println("closed");
    servo.write(90);
}


  digitalWrite(10, LOW);
  delayMicroseconds(2);
  digitalWrite(10, HIGH);
  delayMicroseconds(10);
  digitalWrite(10, LOW);
  duration=pulseIn(12,HIGH);
  distance=duration*0.034/2;
  
  if(distance<10){
    full = 1;
    digitalWrite(4, HIGH);
    Serial.println("full remaining distance is");
    Serial.print(distance);
    delay(1000);
      if(x==1){
    servo.write(90);

}
}
else{


    full = 0;
    digitalWrite(4,LOW);
}



}