// Define the pins for the LED lights and light intensity modulator
const int LED_PIN = 9;
const int MODULATOR_PIN = 10;

// Define the pins for the screen and keyboard
#include <LiquidCrystal.h>
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
const int ROWS = 2;
const int COLS = 3;
char keys[ROWS][COLS] = {
  {'1', '2', '3'},
  {'4', '5', '6'}
};
byte rowPins[ROWS] = {A3, A2};
byte colPins[COLS] = {A1, A0, 13};
Keypad keypad = Keypad(makeKeymap(keys), rowPins, colPins, ROWS, COLS);

void setup() {
  // Set the LED and modulator pins as outputs
  pinMode(LED_PIN, OUTPUT);
  pinMode(MODULATOR_PIN, OUTPUT);

  // Set up the screen and display a welcome message
  lcd.begin(16, 2);
  lcd.print("Car LED Lights");
  lcd.setCursor(0, 1);
  lcd.print("Press a key...");

  // Set up the keyboard
  keypad.setDebounceTime(50);
}

void loop() {
  // Read the value from the keyboard
  char key = keypad.getKey();

  // If a key is pressed, process it
  if (key != NO_KEY) {
    // Clear the screen and display the selected key
    lcd.clear();
    lcd.print("Key: ");
    lcd.print(key);

    // Set the LED lights and modulator based on the selected key
    switch (key) {
      case '1':
        analogWrite(MODULATOR_PIN, 0);
        analogWrite(LED_PIN, 0);
        break;
      case '2':
        analogWrite(MODULATOR_PIN, 63);
        analogWrite(LED_PIN, 63);
        break;
      case '3':
        analogWrite(MODULATOR_PIN, 127);
        analogWrite(LED_PIN, 127);
        break;
      case '4':
        analogWrite(MODULATOR_PIN, 191);
        analogWrite(LED_PIN, 191);
        break;
      case '5':
        analogWrite(MODULATOR_PIN, 255);
        analogWrite(LED_PIN, 255);
        break;
      case '6':
        analogWrite(MODULATOR_PIN, 0);
        analogWrite(LED_PIN, 255);
        break;
      default:
        break;
    }

    // Display the properties on the screen
    lcd.setCursor(0, 0);
    lcd.print("Intensity: ");
    lcd.print(analogRead(MODULATOR_PIN));
    lcd.print("  ");
    lcd.setCursor(0, 1);
    lcd.print("Brightness: ");
    lcd.print(analogRead(LED_PIN));
    lcd.print("  ");
  }
}