gistfile1.java

#include <Wire.h>

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

int algo;
void loop()
{
  algo = HIGH;
  Wire.beginTransmission(2);
  Wire.send(13);
  Wire.send(algo);
  Wire.endTransmission();
  delay(500);
  algo = LOW;
  Wire.beginTransmission(2);
  Wire.send(13);
  Wire.send(algo);
  Wire.endTransmission();
  delay(500);
}