#include <Adafruit_GFX.h>
#include <Adafruit_ILI9341.h>
#include <SPI.h>

// Define pins for the display
#define TFT_CS     15
#define TFT_DC     14
#define TFT_RST    13
#define TFT_BLK    12  // Backlight control pin

// Define pin for the motion detector
#define MOTION_PIN 4

// Initialize ILI9341 display
Adafruit_ILI9341 display = Adafruit_ILI9341(TFT_CS, TFT_DC, TFT_RST);

void setup() {
  // Initialize the display
  display.begin();
  
  // Turn on the backlight
  pinMode(TFT_BLK, OUTPUT);
  digitalWrite(TFT_BLK, HIGH);
  
  // Clear the screen with black color
  display.fillScreen(ILI9341_BLACK);
  
  // Initialize the motion detector pin
  pinMode(MOTION_PIN, INPUT);
  
  // Display initial message
  display.setCursor(10, 10);
  display.setTextColor(ILI9341_WHITE);
  display.setTextSize(2);
  display.print("Waiting for motion...");
}

void loop() {
  // Check for motion
  if (digitalRead(MOTION_PIN) == HIGH) {
    // Clear the screen
    display.fillScreen(ILI9341_BLACK);
    
    // Display motion detected message
    display.setCursor(10, 10);
    display.setTextColor(ILI9341_RED);
    display.setTextSize(2);
    display.print("Motion Detected!");
    
    // Wait for a while to avoid multiple triggers
    delay(2000);
    
    // Clear the screen again
    display.fillScreen(ILI9341_BLACK);
    
    // Display waiting message
    display.setCursor(10, 10);
    display.setTextColor(ILI9341_WHITE);
    display.setTextSize(2);
    display.print("Waiting for motion...");
  }
}