// Include the necessary libraries
#include <Wire.h>
#include <LiquidCrystal.h>

// Initialize the LiquidCrystal library with the numbers of the interface pins
LiquidCrystal lcd(12, 11, 10, 9, 8, 7);

// Define the pin connected to the potentiometer
int potPin = A0;
// Variable to store the value read from the potentiometer
int potValue = 0;

void setup() {
  // Set up the LCD's number of columns and rows
  lcd.begin(16, 2);
  // Print a message to the LCD
  lcd.print("Heart Rate:");
  // Wait for 2 seconds
  delay(2000);
}

void loop() {
  // Clear the LCD screen
  lcd.clear();
  // Initialize an empty string for the message
  String message = "";

  // Read the value from the potentiometer and divide by 10
  potValue = analogRead(potPin) / 10;
  // Check the potentiometer value and set the appropriate message
  if (potValue <= 30) {
    message = " - TOO LOW";
  } else if (potValue > 30 && potValue <= 70) {
    message = " - NORMAL";
  } else {
    message = " - TOO HIGH";
  }

  // Set the cursor to column 0, line 2
  lcd.setCursor(0, 2);
  // Print the potentiometer value and the message to the LCD
  lcd.print(potValue + message);
  // Wait for 100 milliseconds
  delay(100);
}