#include <SoftwareSerial.h>
SoftwareSerial pSerial(0,1);    // Initialize serial port on pins 1, 0  (RXD, TXD)
 
void setup() {
  // initialize digital pins 2 and 3 as outputs.
  pinMode(3, OUTPUT);
  pinMode(2, OUTPUT);
  pSerial.begin(9600);   //Initialize Serial port to computer
}

void loop() {
  if (pSerial.available()) {
    char c = pSerial.read();
    if (c == 'R') {
      digitalWrite(3, HIGH);
      }
    else if (c == 'B') {
      digitalWrite(2, HIGH);
      } 
    else if (c == 'L') {
      digitalWrite(3, LOW);
      digitalWrite(2, LOW);
      } 
   pSerial.println(c);
   }
}