String color;
String msg1="What color LED do you want ?";
int LEDr=13;
int LEDg=12;
int LEDb=11;
int wait = 1000;








void setup() {
 
   pinMode (LEDr,OUTPUT);
   pinMode (LEDg,OUTPUT);
   pinMode (LEDb,OUTPUT);

   
   
   
   Serial.begin(9600);

}

void loop() {
  Serial.print (msg1);
  while (Serial.available ()==0){

  }
  color=Serial.readStringUntil ('\n');
  if (color=="red"){
    digitalWrite (LEDr,HIGH);
    digitalWrite (LEDb,LOW);
    digitalWrite (LEDg,LOW);

  }
    if (color == "green"){
    digitalWrite (LEDr,LOW);
    digitalWrite (LEDb,LOW);
    digitalWrite (LEDg,HIGH);
    }
      if (color == "blue"){
    digitalWrite (LEDr,LOW);
    digitalWrite (LEDb,HIGH);
    digitalWrite (LEDg,LOW);

      }


}