const int RED   = A3;
const int GREEN = A4;
const int BLUE  = A5;

void setup() {
  pinMode(RED,   OUTPUT);
  pinMode(GREEN, OUTPUT);
  pinMode(BLUE,  OUTPUT);
}

void loop() {
  analogWrite(RED,   0);
  analogWrite(GREEN, 255);
  analogWrite(BLUE,  255);

  delay(400);

  analogWrite(RED,   0);
  analogWrite(GREEN, 0);
  analogWrite(BLUE,  255);

  delay(400);

  analogWrite(RED,   255);
  analogWrite(GREEN, 0);
  analogWrite(BLUE,  255);

  delay(400);

  analogWrite(RED,   255);
  analogWrite(GREEN, 0);
  analogWrite(BLUE,  0);

  delay(400);

  analogWrite(RED,   255);
  analogWrite(GREEN, 255);
  analogWrite(BLUE,  0);

  delay(400);

  analogWrite(RED,   0);
  analogWrite(GREEN, 255);
  analogWrite(BLUE,  0);

  delay(400);



}