Simple Hand Wash Timer

/*
 *   DISTANCE SENSOR:
        VCC: 5V
        Trigger to Pin 8
        Echo to Pin 9
        GND to GND

      The LCD:
 * LCD RS pin to digital pin 12
 * LCD Enable pin to digital pin 11
 * LCD D4 pin to digital pin 5
 * LCD D5 pin to digital pin 4
 * LCD D6 pin to digital pin 3
 * LCD D7 pin to digital pin 2
 * LCD R/W pin to ground
 * LCD VSS pin to ground
 * LCD VCC pin to 5V
 * 10K resistor:
 * ends to 5V and ground
 * wiper to LCD VO pin (pin 3)    
 * 
 * 
 *    The buzzer:
 * posotive leg to pin 7
 * negaitive leg to gnd
 */
 
#include <LiquidCrystal.h>
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

int buzzerPin = 7;
int trigPin = 8;    
int echoPin = 9;    
int handDistance = 2000;   //this will vary depending on how big your sink is. If the closest object is less than handDistance, then the countdown starts. Use the serial monitor to determine what it's value shoud be. 
 
void setup() {
  //begin serial monitor
  Serial.begin (9600);
  //specify inputs and outputs
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
  //The LCD has 16 columns and two rows
  lcd.begin(16, 2);
  // Start writing at this point
  lcd.setCursor(0, 2);
}
 
void loop() {
  //clear the LCD
  lcd.clear();
  // Print to the LCD
  lcd.print("Hand wash timer");
  // Use the distance sensor
  digitalWrite(trigPin, LOW);
  delayMicroseconds(5);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);
  int distance = pulseIn(echoPin, HIGH);
  // Print to the Serial Monitor (optional)
  Serial.println(distance);


  // if the nearest object is less then 2000 units away...
  if (distance < handDistance){
    //sounds buzzer
  tone(buzzerPin, 1000, 1000);
  // repeats the code that tells how many seconds are left for thrity seconds
    for (int i = 30; i  > 0; --i){
      lcd.setCursor(0, 1);
      lcd.print(i);
      delay(1000);
      lcd.setCursor(0, 1);
      lcd.print("  ");
    }
    //sounds the buzzer after the thirty seconds are up
    tone(buzzerPin, 1000, 2500);
    
  }

  delay(500);
  
  

}