int ledPinBl = D5;
int ledPinRe = D2;
int ledPin;

void setup() {
    
    // Configure the pins to be outputs
    pinMode(ledPinBl, OUTPUT);
    pinMode(ledPinRe, OUTPUT);
    // Initialize both the LEDs to be OFF
    digitalWrite(ledPinBl, LOW);
    digitalWrite(ledPinRe, LOW);
    //Register our Particle function here
    Particle.function("strength", strengthControl);
    Particle.function("blink 3 times", blinkControl1);
    Particle.function("blink n times", blinkControl2);
    Particle.function("which LED you want to control", ledControl);

}

void loop() {

}

// 1 means the command works while -1 means fails
int ledControl(String command)
{
  // get which led the user want to control
  if(command == "RED"){
	   ledPin = ledPinRe;
  }else if(command == "BLUE"){ 
	   ledPin = ledPinBl;
  }else{
	   return -1;
  }
  // write to the appropriate pin and signal the user his/her choice
  digitalWrite(ledPin, HIGH);
  delay(500);
  digitalWrite(ledPin, LOW);
  return ledPin;
}

int strengthControl(String command)
{
   int state = LOW;
   // find out the state of the led
   if(command == "HIGH"){
	   state = HIGH;
   }else if(command == "LOW"){ 
	   state = LOW;
   }else{
	   return -1;
   }
   // write to the appropriate pin
   digitalWrite(ledPin, state);
   return 1;
}

int blinkControl1(String command)
{
   delay(500);
   digitalWrite(ledPin, HIGH);
   delay(500);
   digitalWrite(ledPin, LOW);
   delay(500);
   digitalWrite(ledPin, HIGH);
   delay(500);
   digitalWrite(ledPin, LOW);
   delay(500);
   digitalWrite(ledPin, HIGH);
   delay(500);
   digitalWrite(ledPin, LOW);
   return 1;
}

int blinkControl2(String command)
{
  // get the number of blinks wanted
  int value = command.toInt();
  // blink loop
    if(value > 0){
        for (int i = 1; i <= value; i++){
            digitalWrite(ledPin, HIGH);
            delay(500);
            digitalWrite(ledPin, LOW);
            delay(500);
        }
    }
    else{
        return -1;
    }
    return 1;
}