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

void loop() {
 
setColor(255, 0, 0);  // red with maximum brightness, when set to less than 255, the led will be dimmer
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){
analogWrite(redPin, red);
analogWrite(greenPin, green);
analogWrite(bluePin, blue);  
}