void setup() {
  // put your setup code here, to run once:
  pinMode(9, OUTPUT);
  pinMode(10, OUTPUT);
  pinMode(11, OUTPUT);
  pinMode(2, OUTPUT);
  pinMode(3, OUTPUT);
  pinMode(4, OUTPUT);
  pinMode(5, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  RGB(255, 0, 0);
  digitalWrite(2, HIGH);
  delay(2500);
  digitalWrite(2, LOW);
  RGB(0, 255, 0);
  digitalWrite(3, HIGH);
  delay(2500);
  digitalWrite(3, LOW);
  RGB(0, 0, 255);
  digitalWrite(4, HIGH);
  delay(2500);
  digitalWrite(4, LOW);
  RGB(255, 255, 255);
  digitalWrite(5, HIGH);
  delay(2500);
  digitalWrite(5, LOW);
}

void RGB(int r,int g,int b)
{
  analogWrite(9,r);
  analogWrite(10,g);
  analogWrite(11,b);
}