#include <LiquidCrystal_I2C.h>

// Set the LCD address, number of columns and rows
#define LCD_address 0x27
#define LCD_columns 16
#define LCD_rows 2

// Define the LED pin
#define LED_PIN 14

// Create an instance of the LiquidCrystal_I2C class
LiquidCrystal_I2C lcd(LCD_address, LCD_columns, LCD_rows);

// Define custom characters
byte customChar[] = {
  0x1F,
  0x10,
  0x10,
  0x10,
  0x10,
  0x10,
  0x10,
  0x1F
};

byte customChar1[] = {
  0x07,
  0x04,
  0x07,
  0x04,
  0x07,
  0x04,
  0x04,
  0x0E
};

byte customChar2[] = {
  0x11,
  0x11,
  0x11,
  0x1F,
  0x11,
  0x11,
  0x11,
  0x11
};

int cursorPos = 0;    // Start position of the cursor
bool ledState = false; // LED state for blinking

void setup() {
  lcd.init();        // Initialize the LCD
  lcd.backlight();   // Turn on the backlight
  pinMode(LED_PIN, OUTPUT); // Set the LED pin as output

  // Create custom characters in the LCD's memory
  lcd.createChar(0, customChar);  
  lcd.createChar(1, customChar1);
  lcd.createChar(2, customChar2);

  // Set up the display content
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.write(0);      // Display the first custom character
  lcd.setCursor(8, 0); // Move cursor to the second column of the first row
  lcd.write(1);      // Display the second custom character
  lcd.setCursor(15, 0); // Move cursor to first column of the second row
  lcd.write(2);      // Display the third custom character
  lcd.setCursor(0, 1);
  lcd.print("...........****"); // Temperature "gauge"
}

void loop() {
  // Move cursor to the current position on the second row
  lcd.setCursor(cursorPos, 1);
  lcd.print(">");         // Display the "reading" cursor
  delay(250);              // Delay for the cursor movement

  // Check if cursor reaches the "*" position
  if (cursorPos >= 11) {   // '*' starts at position 11
    digitalWrite(LED_PIN, ledState);  // Blink the LED
    ledState = !ledState;             // Toggle LED state
    delay(500);                       // LED blink delay
  } else {
    digitalWrite(LED_PIN, LOW);       // Ensure LED is off if cursor is not at '*'
  }

  // Clear the cursor symbol before moving to the next position
  lcd.setCursor(cursorPos, 1);
  lcd.print(".");   // Restore original character

  // Move cursor to the next position
  cursorPos++;
  if (cursorPos > 15) { // Reset cursor to the start after reaching the end
    cursorPos = 0;
  }
}