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

#define TFT_CS 10
#define TFT_DC 9
#define TFT_RST 8

#define TS_CS A5
#define TS_IRQ 2

Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC, TFT_RST);
TouchScreen ts = TouchScreen(SP, YL, XH, YL, 300);

void setup() {
  Serial.begin(9600);
  tft.begin();
  tft.setRotation(0);
}

void loop() {
  // Display a green background
  tft.fillScreen(ILI9341_GREEN);  // 16-bit color for green

  // Display a red square (40x40 pixels) in the bottom right corner
  int squareSize = 40;
  int squareColor = ILI9341_RED;  // 16-bit color for red
  int xStart = tft.width() - squareSize;
  int yStart = tft.height() - squareSize;

  tft.fillRect(xStart, yStart, squareSize, squareSize, squareColor);

  // Check for touch input
  TSPoint touch = ts.getPoint();

  // Check if the touch is within the red square
  if (touch.z > 0 && touch.x > xStart && touch.x < (xStart + squareSize) && touch.y > yStart && touch.y < (yStart + squareSize)) {
    // Change the background to blue
    tft.fillScreen(ILI9341_BLUE);  // 16-bit color for blue
    delay(1000);  // Add a delay for better touch response
  }

  // Clear the screen for the next iteration
  tft.fillScreen(ILI9341_BLACK);  // 16-bit color for black
}