#define RLED 8
#define GLED 9
#define BLED 10

void setup() {
  pinMode(RLED, OUTPUT);
  pinMode(GLED, OUTPUT);
  pinMode(BLED, OUTPUT);
  Serial.begin(9600);
}
void loop() {
  Serial.println("Purple = RED+BLUE");
  digitalWrite(BLED, LOW);
  digitalWrite(RLED, LOW);
  delay(1000);
  digitalWrite(RLED, HIGH);
  digitalWrite(GLED, HIGH);
  digitalWrite(BLED, HIGH);

  Serial.println("Yellow = GREEN+RED");
  digitalWrite(GLED, LOW);
  digitalWrite(RLED, LOW);
  delay(1000);
  digitalWrite(RLED, HIGH);
  digitalWrite(GLED, HIGH);
  digitalWrite(BLED, HIGH);

  Serial.println("White = BLUE+GREEN+RED");
  digitalWrite(BLED, LOW);
  digitalWrite(RLED, LOW);
  digitalWrite(GLED, LOW);
  delay(1000);
  digitalWrite(RLED, HIGH);
  digitalWrite(GLED, HIGH);
  digitalWrite(BLED, HIGH);
}