int redPin = 11;
int bluePin = 10;
int greenPin = 9;
int duration = 500;

void setup()
{

pinMode (redPin, OUTPUT);
pinMode (greenPin, OUTPUT);
pinMode (bluePin, OUTPUT);

}

void loop()
{
 setColor(0, 0 , 0);
 delay(duration);

 setColor(255, 0, 0);//red
 delay(duration);

 setColor(0, 255, 0);//green
 delay(duration);

setColor(0, 0, 255);//blue
 delay(duration);

setColor(255, 255, 255);//white
 delay(duration);


 setColor(255, 255, 0);//yellow
 delay(duration);

 setColor(80, 0, 80);//purple
 delay(duration);

setColor(0, 255, 255);//aqua
 delay(duration);

setColor(127, 127, 127);//grey
 delay(duration);

setColor(35, 46, 179);//grey
 delay(duration);

 setColor(230, 58, 250);//grey
 delay(duration);

setColor(111, 47, 47);//grey
 delay(duration);
}

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

 red = 255 - red;
 green = 255 - green;
 blue = 255 - blue;
 analogWrite(redPin, red);
 analogWrite(greenPin, green);
 analogWrite(bluePin, blue);


}