Contact less sanitizer system

const int servo = 9;     //define Servo Signal Pin
const int trigPin = 10;  //define Trigger Pin
const int echoPin = 11;  //define Echo Pin

// defines variables

long duration;
int distance;

#include <Servo.h>

Servo myservo;    

int pos = 0;   

void setup() {
  pinMode(trigPin, OUTPUT);    
  pinMode(echoPin, INPUT);   
  myservo.attach(servo);      
  myservo.write(0);        
  Serial.begin(9600);      
}

void loop() {
    //
    digitalWrite(trigPin, LOW);
    delayMicroseconds(2);
    
    // Sets the trigPin on HIGH state for 10 micro seconds
    
    digitalWrite(trigPin, HIGH);
    delayMicroseconds(10);
    digitalWrite(trigPin, LOW);
    
    
    
    duration = pulseIn(echoPin, HIGH);
    
    // Calculating the distance
   
    distance= duration*0.034/2;
    
    // Prints the distance on the Serial Monitor
    Serial.print("Distance: ");
    Serial.println(distance);
    
    //Servo
    
    if(distance<10)
    { //Check distance < 10cm 
       myservo.write(45); 
       delay(100);
       myservo.write(90);
       delay(100);
        myservo.write(135);
       delay(100);
       myservo.write(120); 
       delay(1000);
       myservo.write(00); 
       delay(2500);   
    }                 
}