// Arduino forum: https://forum.arduino.cc/t/leds-will-not-blink/1188686
// This Wokwi project: https://wokwi.com/projects/381295738042823681

int redPin = 12;
int greenPin = 11;
int bluePin = 10;
String myColor;
String msg("What color LED? ");

void setup() {
  // put your setup code here, to run once:

  Serial.begin(9600);

  pinMode(redPin, OUTPUT);
  pinMode(greenPin, OUTPUT);
  pinMode(bluePin, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:

  Serial.println(msg);

  while (Serial.available() == 0) {
  }

  myColor = Serial.readStringUntil('\n');  // Changed

  myColor.trim();                          // Added

  Serial.print("You typed: ");             // Added
  Serial.println(myColor);                 // Added

  if (myColor == "red" || myColor == "Red") {

    Serial.println("Red activated");       // Added

    digitalWrite(redPin, HIGH);
    digitalWrite(greenPin, LOW);
    digitalWrite(bluePin, LOW);

    delay(5000);                           // Added

    digitalWrite(redPin, LOW);
    digitalWrite(greenPin, HIGH);
    digitalWrite(bluePin, LOW);

    digitalWrite(redPin, LOW);
    digitalWrite(greenPin, LOW);
    digitalWrite(bluePin, HIGH);

    digitalWrite(redPin, LOW);
    digitalWrite(greenPin, LOW);
    digitalWrite(bluePin, LOW);
  }
}