int redPin = 12;
int bluePin = 11;
int greenPin = 10;
String myColor;
String msg1 = "What LED do you blink ";

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

void loop() {
  Serial.println(msg1);
 
  while (Serial.available() == 0) {
    // Wait for user input
  }

  myColor = Serial.readString(); // Read until newline character
  myColor.trim(); // Remove leading and trailing whitespaces
  myColor.toLowerCase(); // Convert to lowercase for case-insensitive comparison

  if (myColor == "red") {
    digitalWrite(redPin, HIGH);
    digitalWrite(greenPin, LOW);
    digitalWrite(bluePin, LOW);
  } 
  if (myColor == "green") {
    digitalWrite(redPin, LOW);
    digitalWrite(greenPin, HIGH);
    digitalWrite(bluePin, LOW);
  } 
  if (myColor == "blue") { // Corrected from "red" to "blue"
    digitalWrite(redPin, LOW);
    digitalWrite(greenPin, LOW);
    digitalWrite(bluePin, HIGH);
  } 
}