#include <Adafruit_GFX.h>
#include <Adafruit_ILI9341.h>
#include <SPI.h>
// DEFINE SPI PINS
#define sck 13
#define mosi 11
// Initialize the TFT display
#define TFT_CS 10
#define TFT_DC 9
Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC);

// Define the colors for the rainbow
#define TFT_RED 0xF800
#define TFT_ORANGE 0xFD20
#define TFT_YELLOW 0xFFE0
#define TFT_GREEN 0x07E0
#define TFT_BLUE 0x001F
#define TFT_INDIGO 0x481F
#define TFT_VIOLET 0xF81F

// Define the initial diameter of the circle
#define CIRCLE_DIA 200

// Define the number of circles to draw
#define CIRCLE_COUNT 7

void setup() {
  // Initialize the TFT display
  tft.begin();
  tft.setRotation(3); // Adjust the rotation if necessary

  // Clear the screen and set the text color to white
  tft.fillScreen(ILI9341_BLACK);
  tft.setTextColor(ILI9341_WHITE);

  // Draw the circles in rainbow colors
  drawCircles();

  // Write diagonally with yellow color and font size 3 by Arvind
  writeDiagonally();
}

void loop() {
  // Nothing to do here
}

// A function to draw the circles in rainbow colors
void drawCircles() {
  // Define an array of colors for the rainbow
  uint16_t colors[CIRCLE_COUNT] = {TFT_RED, TFT_ORANGE, TFT_YELLOW, TFT_GREEN, TFT_BLUE, TFT_INDIGO, TFT_VIOLET};

  // Define the coordinates of the circle center
  int x = tft.width() / 2;
  int y = tft.height() / 2;

  // Define the initial diameter of the circle
  int dia = CIRCLE_DIA;

  // Loop through the circle count
  for (int i = 0; i < CIRCLE_COUNT; i++) {
    // Draw the circle with the corresponding color
    tft.fillCircle(x, y, dia / 2, colors[i]);

    // Reduce the diameter by 10 pixels
    dia -= 25;
  }
}

// A function to write diagonally with yellow color and font size 3 by Arvind
void writeDiagonally() {
  // Set the text color to yellow
  tft.setTextColor(TFT_GREEN);

  // Set the text size to 3
  tft.setTextSize(2);

  // Define the initial coordinates of the text
  int x = 40;
  int y = 60;

  // Define the text to write
  char text[] = "by Arvind";

  // Loop through the characters of the text
  for (int i = 0; i < strlen(text); i++) {
    // Write the character at the current position
    tft.write(text[i]);

    // Move the cursor diagonally by 20 pixels
    x += 20;
    y += 20;

    // Set the cursor to the new position
    tft.setCursor(x, y);
  }
}