// Maha Al Hashimi
// FabLab UAE
// Fab Academy 2020

#include <Wire.h>

void setup()
{
  Wire.begin(); // join i2c bus
}

void loop()
{
  Wire.beginTransmission(1); // transmit to device #1
  Wire.write("a");// sends a to turn on LED
  delay(500);
  Wire.write("b");// sends b to turn off LED  
  Wire.endTransmission(); // stop transmitting
  delay(500);
}