#include <Wire.h>
int pinLed = 0;
int x = 0;

void setup(){
    Wire.begin(1);
    Wire.onReceive(receiveEvent);
    pinMode(pinLed, OUTPUT);
}

void loop(){
    delay(100);
}

void receiveEvent(int howMany){
    x = Wire.read();
    if (x == 1){
        digitalWrite(pinLed, LOW);
    }else{
        digitalWrite(pinLed, HIGH);
    }
}