// E4.6
const int redPin = 3;
const int greenPin = 6;
const int bluePin = 5;

void setup() {
  Serial.begin(9600);
  pinMode(redPin, OUTPUT); 
  pinMode(greenPin, OUTPUT); 
  pinMode(bluePin, OUTPUT); 

}

void loop() {
  while (Serial.available() > 0) {
    int red = Serial.parseInt();
    int green = Serial.parseInt();
    int blue = Serial.parseInt();

    red = constrain(red, 0, 255);
    green = constrain(green, 0, 255);
    blue = constrain(blue, 0, 255);

    analogWrite(redPin, red);
    analogWrite(greenPin, green);
    analogWrite(bluePin, blue);

    Serial.println(red);
    Serial.println(green);
    Serial.println(blue);
  }
}