int redPin = 9;

int greenPin = 11;

int bluePin = 10;

//uncomment this line if using a Common Anode LED

//#define COMMON_ANODE

void setup()

{

  pinMode(redPin, OUTPUT);

  pinMode(greenPin, OUTPUT);

  pinMode(bluePin, OUTPUT);  

}

void loop()

{

  setColor(255, 0, 0);  // red

  delay(1000);

  setColor(0, 255, 0);  // green

  delay(1000);

  setColor(0, 0, 255);  // blue

  delay(1000);

  setColor(255, 255, 0);  // yellow

  delay(1000);  

  setColor(80, 0, 80);  // purple

  delay(1000);

  setColor(0, 255, 255);  // aqua

  delay(1000);

}

void setColor(int red, int green, int blue)

{

  #ifdef COMMON_ANODE

    red = 255 - red;

    green = 255 - green;

    blue = 255 - blue;

  #endif

  analogWrite(redPin, red);

  analogWrite(greenPin, green);

  analogWrite(bluePin, blue);  

}