//i2c code to connect 3 other boards to turn on and off lights in turn
// by typing 1, 2, 3, 4, 5, 6
#include <Wire.h>

void setup() {
Serial.begin(9600);
Wire.begin();
}

void loop() {
  while(Serial.available())
{
  char c = Serial.read();

  if(c == '1')
  { Wire.beginTransmission(5); //begin transmitting to address 5
    Wire.write('H');
    Wire.endTransmission();
    digitalWrite(13, HIGH);    
  }
  else if(c == '2')
  { Wire.beginTransmission(5);
    Wire.write('L');
    Wire.endTransmission();
     digitalWrite(13, LOW);
  }

     if(c == '3')
  { 
    Wire.beginTransmission(6);
    Wire.write('H');
    Wire.endTransmission();
     digitalWrite(13, HIGH);         
  }
  else if(c == '4')
  { Wire.beginTransmission(6);
    Wire.write('L');
    Wire.endTransmission();
     digitalWrite(13, LOW);
    }

    if(c == '5')
  { Wire.beginTransmission(7);
    Wire.write('H');
    Wire.endTransmission();
     digitalWrite(13, HIGH);         
  }
  else if(c == '6')
  { Wire.beginTransmission(7);
    Wire.write('L');
    Wire.endTransmission();
     digitalWrite(13, LOW);
    }}}