int red = 9;
int green = 10;
int blue = 11;

void setup() {
  pinMode(red, OUTPUT);
  pinMode(green, OUTPUT);
  pinMode(blue, OUTPUT);
}

void loop() {
  RED();
  delay(1000);
  GREEN();
  delay(1000);
  BLUE();
  delay(1000);
}

void RED(){
  digitalWrite(red, LOW);
  digitalWrite(green, HIGH);
  digitalWrite(blue, HIGH);
}
void GREEN(){
  digitalWrite(red, HIGH);
  digitalWrite(green, LOW);
  digitalWrite(blue, HIGH);
}
void BLUE(){
  digitalWrite(red, HIGH);
  digitalWrite(green, HIGH);
  digitalWrite(blue, LOW);
}

void YELLOW(){
  digitalWrite(red, LOW);
  digitalWrite(green, LOW);
  digitalWrite(blue, HIGH);
}

void ORANGE(){
  analogWrite(red,0); // 0-255
  analogWrite(green,128);
  analogWrite(blue,255);
}