// Include the required Wire library for I2C<br>

#include <Wire.h>
int LED = 13;

int x = 0;
void setup() {

  pinMode(LED_BUILTIN, OUTPUT);

  // Start the I2C Bus as Master
  Wire.begin();
  Serial.begin(9600);
}
void loop() {
  digitalWrite(LED_BUILTIN, HIGH);
  delay(1000);
  digitalWrite(LED_BUILTIN, LOW);
  delay(1000);
  
  Serial.println("transmission starting");

  Wire.beginTransmission(9); // transmit to device #9
  Wire.write(x);              // sends x
  Wire.endTransmission();    // stop transmitting
  Serial.println("transmission ended");


  x++; // Increment x
  if (x > 5) x = 0; // `reset x once it gets 6
  delay(500);
}