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

// Define SPI pins for RP2040 Pico
#define TFT_CS    17  // Chip select control pin (GP17)
#define TFT_DC    16  // Data Command control pin (GP16)
#define TFT_RST  21  // Reset pin (can be connected or left unused) (GP18)
#define TFT_MOSI  19  // SPI MOSI (GP19)
#define TFT_SCLK  18  // SPI Clock (GP18)
#define TFT_MISO  20  // SPI MISO (not used by the display) (GP20)

Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC, TFT_CS);

#define WIDTH 320
#define HEIGHT 240

void setup(void) {
  // Initialize the display
  tft.begin();
  tft.setRotation(1);
}

void loop() {
  float scale[9];
  for (byte i = 0; i < 9; i++)
    scale[i] = (float)rand() / RAND_MAX / 4;

  for (int y = 0; y < HEIGHT; y++) {
    float ySin1 = sin(y * scale[1]);
    float ySin5 = sin(y * scale[5]);
    float yScaled2 = y * scale[2];
    for (int x = 0; x < WIDTH; x++) {
      float xScaled0 = x * scale[0];
      float xScaled3 = x * scale[3];
      float xyScaled4 = (x + y) * scale[4];

      uint8_t r = 15.5 + 15.5 * sin(xScaled0 + ySin1);
      uint8_t g = 31.5 + 31.5 * cos(yScaled2 + sin(xScaled3));
      uint8_t b = 15.5 + 15.5 * sin(xyScaled4 + ySin5);

      uint16_t rgb565 = b | (g << 5) | (r << 11);
      tft.drawPixel(x, y, rgb565);
    }
  }

  // Set the text color to yellow
  tft.setTextColor(ILI9341_YELLOW);
  // Set the text size to 2 (adjust as needed)
  tft.setTextSize(2);
  // Set the cursor position (adjust as needed)
  tft.setCursor(10, 210);
  // Print the text "By Arvind"
  tft.print("By Arvind");
}