int R = 3;
int G = 5;
int B = 6;

void setup() {
  pinMode(R, OUTPUT);
  pinMode(G, OUTPUT);
  pinMode(B, OUTPUT);
}

void loop() {
  // 1. Red
  analogWrite(R, 255);
  analogWrite(G, 0);
  analogWrite(B, 0);
  delay(1000);

  // 2. Orange
  analogWrite(R, 255);
  analogWrite(G, 128);
  analogWrite(B, 0);
  delay(1000);

  // 3. Yellow
  analogWrite(R, 255);
  analogWrite(G, 255);
  analogWrite(B, 0);
  delay(1000);

  // 4. Chartreuse
  analogWrite(R, 128);
  analogWrite(G, 255);
  analogWrite(B, 0);
  delay(1000);

  // 5. Green
  analogWrite(R, 0);
  analogWrite(G, 255);
  analogWrite(B, 0);
  delay(1000);

  // 6. Spring Green
  analogWrite(R, 0);
  analogWrite(G, 255);
  analogWrite(B, 128);
  delay(1000);

  // 7. Cyan
  analogWrite(R, 0);
  analogWrite(G, 255);
  analogWrite(B, 255);
  delay(1000);

  // 8. Azure
  analogWrite(R, 0);
  analogWrite(G, 128);
  analogWrite(B, 255);
  delay(1000);

  // 9. Blue
  analogWrite(R, 0);
  analogWrite(G, 0);
  analogWrite(B, 255);
  delay(1000);

  // 10. Violet
  analogWrite(R, 128);
  analogWrite(G, 0);
  analogWrite(B, 255);
  delay(1000);

  // 11. Magenta
  analogWrite(R, 255);
  analogWrite(G, 0);
  analogWrite(B, 255);
  delay(1000);

  // 12. Rose
  analogWrite(R, 255);
  analogWrite(G, 0);
  analogWrite(B, 128);
  delay(1000);
}