int controlLed(String command);

void setup()
{
  pinMode(7, OUTPUT);
  digitalWrite(7,LOW);
  // register the cloud function
  Particle.function("particle", controlLed); // the name of function on IFTTT
}

void loop()
{
  // this loops forever
}

// this function automagically gets called upon a matching POST request
int controlLed(String command)
{
  // look for the matching argument "coffee" <-- max of 64 characters long
  if(command == "on")
  {
    digitalWrite(7,HIGH);
    return 1;
  }
  else if(command == "off")
  {
    digitalWrite(7,LOW);
    return 1;
  }
  else return -1;
}