// Include the required Wire library for I2C<br>
#include <Wire.h>
//int LED = 13;
int x = 0;
void setup() {
  //initializes the serial
  Serial.begin(9600);
  // Define the LED pin as Output
  pinMode (LED_BUILTIN, OUTPUT);
  // Start the I2C Bus as Slave on address 9
  Wire.begin(9); 
  // Attach a function to trigger when something is received.
  Wire.onReceive(receiveEvent);
}
void receiveEvent(int bytes) {
  x = Wire.read();    // read one character from the I2C
  //Serial.write(x);
}
void loop() {

  if (x == '0') {
    Serial.write(x);
    delay(500);
    digitalWrite(LED_BUILTIN, HIGH);
    delay(200);
    digitalWrite(LED_BUILTIN, LOW);
    delay(200);
    digitalWrite(LED_BUILTIN, HIGH);
    delay(200);
    digitalWrite(LED_BUILTIN, LOW);
    delay(200);
  }
  
  if (x == '3') {
    Serial.write(x);
    digitalWrite(LED_BUILTIN, HIGH);
    delay(400);
    digitalWrite(LED_BUILTIN, LOW);
    delay(400);
    digitalWrite(LED_BUILTIN, HIGH);
    delay(1000);
    digitalWrite(LED_BUILTIN, LOW);
  }
}