#include<SoftwareSerial.h>
char state ;
/* Create object named bt of the class SoftwareSerial */
SoftwareSerial bt(0,1); /* (Rx,Tx) */  

void setup() {
  bt.begin(9600); /* Define baud rate for software serial communication */
  pinMode(2,OUTPUT);
  pinMode(3,OUTPUT);
}

void loop() {
 
    if (bt.available()) /* If data is available on serial port */
    {
     state= bt.read();


     if (state == '0'){
      digitalWrite (3, HIGH);
            digitalWrite (2, LOW);

     }
     if (state == '1'){
      digitalWrite (2, HIGH);
            digitalWrite (3, LOW);

     }
    }
}