void setup() {
  Serial.begin(9600);
  pinMode(2, OUTPUT);
  pinMode(3, OUTPUT);
  pinMode(4, OUTPUT);
  digitalWrite(2, LOW);
  digitalWrite(3, LOW);
  digitalWrite(4, LOW);
  // put your setup code here, to run once:

}

void loop() {
  Serial.println("First light up the basic colors.");
  delay(1000);
  digitalWrite(2, HIGH);
  Serial.println("Red LED is ON.");
  delay(1000);
  digitalWrite(2, LOW);
  digitalWrite(3, HIGH);
  Serial.println("Blue LED is ON.");
  delay(1000);
  digitalWrite(3, LOW);
  digitalWrite(4, HIGH);
  Serial.println("Green LED is ON.");
  delay(1000);
  digitalWrite(4, LOW);
  
  Serial.println("Now the mixing starts.");
  delay(1000);
  digitalWrite(2, HIGH);
  digitalWrite(3, HIGH);
  Serial.println("Mixing red and blue, the result is purple.");
  delay(1000);
  digitalWrite(2, LOW);
  digitalWrite(3, LOW);

  digitalWrite(2, HIGH);
  digitalWrite(4, HIGH);
  Serial.println("Mixing red and green, the result is yellow.");
  delay(1000);
  digitalWrite(2, LOW);
  digitalWrite(477, LOW);

  digitalWrite(3, HIGH);
  digitalWrite(4, HIGH);
  Serial.println("Mixing blue and green, the result is tirkiz.");
  delay(1000);
  digitalWrite(3, LOW);
  digitalWrite(4, LOW);

  digitalWrite(2, HIGH);
  digitalWrite(3, HIGH);
  digitalWrite(4, HIGH);
  Serial.println("Mixing red, blue and green, the result is white.");
  delay(1000);
  digitalWrite(2, LOW);
  digitalWrite(3, LOW);
  digitalWrite(4, LOW);

}