int ledPinR = D2;
int ledPinB = D3;

void setup()
{
    pinMode(ledPinR, OUTPUT);
    pinMode(ledPinB, OUTPUT);
    digitalWrite(ledPinR, LOW);
    digitalWrite(ledPinB, LOW);
    Particle.function("led", ledControl);
}

void loop()
{
    
}

int ledControl(String command)
{
    int state = LOW;
    if(command == "HIGH") {
        state = HIGH;
    }else if(command == "LOW"){
        state = LOW;
    }else{
        return -1;
    }
    digitalWrite(ledPinR, state);
    digitalWrite(ledPinB, state);
    return 1;
}