// Super Simple Mood Lamp
// Automatically cycles through rainbow colors

int redPin = 9;
int greenPin = 10;
int bluePin = 11;

// Starting color: Red
int redValue = 255;
int greenValue = 0;
int blueValue = 0;

void setup() {
  pinMode(redPin, OUTPUT);
  pinMode(greenPin, OUTPUT);
  pinMode(bluePin, OUTPUT);
}

void loop() {
  // Red → Yellow (Red + Green)
  while (greenValue < 255) {
    greenValue++;
    analogWrite(redPin, redValue);
    analogWrite(greenPin, greenValue);
    analogWrite(bluePin, blueValue);
    delay(10);
  }
  
  // Yellow → Green (Red goes away)
  while (redValue > 0) {
    redValue--;
    analogWrite(redPin, redValue);
    analogWrite(greenPin, greenValue);
    analogWrite(bluePin, blueValue);
    delay(10);
  }
  
  // Green → Cyan (Green + Blue)
  while (blueValue < 255) {
    blueValue++;
    analogWrite(redPin, redValue);
    analogWrite(greenPin, greenValue);
    analogWrite(bluePin, blueValue);
    delay(10);
  }
  
  // Cyan → Blue (Green goes away)
  while (greenValue > 0) {
    greenValue--;
    analogWrite(redPin, redValue);
    analogWrite(greenPin, greenValue);
    analogWrite(bluePin, blueValue);
    delay(10);
  }
  
  // Blue → Magenta (Blue + Red)
  while (redValue < 255) {
    redValue++;
    analogWrite(redPin, redValue);
    analogWrite(greenPin, greenValue);
    analogWrite(bluePin, blueValue);
    delay(10);
  }
  
  // Magenta → Red (Blue goes away)
  while (blueValue > 0) {
    blueValue--;
    analogWrite(redPin, redValue);
    analogWrite(greenPin, greenValue);
    analogWrite(bluePin, blueValue);
    delay(10);
  }
}