Waterbottle refilling machine v1

#include <LiquidCrystal.h>
#include <NewPing.h>
#include <Servo.h>
#define TRIGGER_PIN  8
#define ECHO_PIN     9
#define MAX_DISTANCE 200
Servo s;
const int PINb = 7;
const int pinSERVO = 10;

LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
NewPing sonar(TRIGGER_PIN, ECHO_PIN, MAX_DISTANCE); // NewPing setup of pins and maximum distance.

void setup() {
  pinMode(INPUT,PINb);
  pinMode(pinSERVO,INPUT);
  s.attach(pinSERVO);
  lcd.begin(16, 2);
  Serial.begin(9600);
  s.write(90);
}

void loop() {
  boolean button = digitalRead(PINb);
  lcd.clear();
  unsigned int uS = sonar.ping();
  Serial.print("Ping: ");
  Serial.print(uS / US_ROUNDTRIP_CM);
  Serial.println("cm");

  if(uS / US_ROUNDTRIP_CM<8){
    if(button){
      lcd.print("Filling");
      s.write(50);
    }
    else{
      lcd.print("Ready to fill");
       s.write(90);
    }

  }
  else{
    lcd.print("Too far away");
    s.write(90);
  }

  delay(500);
}