#include <Arduino.h>
#include <Servo.h>  // Included as permitted, though not utilized in this example

// Define pin connections
const int led1Pin = 22;    // Single-color LED control pin

// RGB LED control pins (using PWM pins for brightness control)
const int rgbPinR = 10;    
const int rgbPinG = 9;
const int rgbPinB = 8;

// Timing intervals (in milliseconds)
const unsigned long interval = 2000;  // 2 seconds interval

// Variables for non-blocking timing
unsigned long previousStatusTime = 0;   // for led1 blinking
unsigned long previousColorTime = 0;    // for RGB color change

bool ledState = false;  // Current state of led1 (off initially)

const int numColors = 7;  // Total number of colors in the sequence
int colorIndex = 0;       // Start with the first color (Red)

// Structure to hold a color (RGB values)
struct Color {
  int r;
  int g;
  int b;
};

// Predefined sequence of colors
Color colors[numColors] = {
  {255, 0, 0},     // Red
  {0, 255, 0},     // Green
  {0, 0, 255},     // Blue
  {255, 255, 0},   // Yellow
  {0, 255, 255},   // Cyan
  {255, 0, 255},   // Magenta
  {255, 255, 255}  // White
};

void setup() {
  // Initialize the single-color LED pin and set it off initially
  pinMode(led1Pin, OUTPUT);
  digitalWrite(led1Pin, LOW);

  // Initialize the PWM pins for the RGB LEDs
  pinMode(rgbPinR, OUTPUT);
  pinMode(rgbPinG, OUTPUT);
  pinMode(rgbPinB, OUTPUT);

  // Set initial RGB LED color (Red, the first in the sequence)
  analogWrite(rgbPinR, colors[colorIndex].r);
  analogWrite(rgbPinG, colors[colorIndex].g);
  analogWrite(rgbPinB, colors[colorIndex].b);
}

void loop() {
  unsigned long currentMillis = millis();

  // Toggle the single-color LED every 2 seconds
  if (currentMillis - previousStatusTime >= interval) {
    previousStatusTime = currentMillis;
    ledState = !ledState;
    digitalWrite(led1Pin, ledState ? HIGH : LOW);
  }

  // Update the color of the RGB LEDs every 2 seconds
  if (currentMillis - previousColorTime >= interval) {
    previousColorTime = currentMillis;
    
    // Proceed to the next color in the sequence (wrap around at the end)
    colorIndex = (colorIndex + 1) % numColors;
    
    analogWrite(rgbPinR, colors[colorIndex].r);
    analogWrite(rgbPinG, colors[colorIndex].g);
    analogWrite(rgbPinB, colors[colorIndex].b);
  }
}