#include <SoftwareSerial.h>

SoftwareSerial blueToothSerial(2,3);
int c = 0;

void setup() {
 blueToothSerial.begin(9600); 
 pinMode(0, OUTPUT); 
 pinMode(4, OUTPUT);
}

void loop() {
c = blueToothSerial.read();  
if(c == 1) 
 {digitalWrite(4, HIGH);      
  digitalWrite(0, HIGH);
  delay(500); }

else if (c == 0) 
{digitalWrite(4, LOW);
 digitalWrite(0, LOW);
 delay(500);}    // turn the LED OFF by making the voltage LOW

else{}    
}