#include <Wire.h>
int LED = 4;
int x = 0;
void setup() {
  // Define the LED pin as Output
  pinMode (LED, OUTPUT);
  // Start the I2C Bus as Slave on address 0x08
//Wire.begin(0x01); 
Wire.begin(0x02); 

  // Attach a function to trigger when something is received.
   Wire.onReceive(receiveEvent);
  Serial.begin(9600);
}
void receiveEvent(int bytes) {
  while(Wire.available() > 0) {
    x = Wire.read();    // read one character from the I2C
    Serial.println(x);
  };
}
void loop() {
  digitalWrite(LED, LOW);
  //If value received is 0 turn off daylight LED
  if (x == 0) {
    digitalWrite(LED, HIGH);
  }
  else 
       digitalWrite(LED, LOW);

    //delay(500);
  }