Spark Core code - Minecraft Christmas Tree

int updateBulb(String command);

int updateRGB(String command);

void setup() {

    Serial1.begin(9600);

    pinMode(D7, OUTPUT);
    digitalWrite(D7, LOW);

    // register the Spark functions
    Spark.function("updateBulb", updateBulb);
    Spark.function("updateRGB", updateRGB);

    RGB.control(true);
    RGB.color(0, 0, 0);

}


void loop() {
                 // Nothing needs to be looped
    }


int updateBulb(String command){

    String cmdF = command.substring(0);

    int rNum = cmdF.toInt();

    if (rNum == 1) {
        digitalWrite(D7,HIGH);
        return 1;
        }

    if (rNum == 0) {
        digitalWrite(D7,LOW);
        return 2;
        }

    return 0;

    }


int updateRGB(String command){

    String cString = command.substring(0);
    int cNum = cString.toInt();

    if(cNum == 1){
        Serial1.print("1"); //decrease RED
        return 11;
        }
    if(cNum == 2){
        Serial1.print("2"); //increase RED
        return 12;
        }
    if(cNum == 3){
        Serial1.print("3"); //decrease GREEN
        return 13;
        }
    if(cNum == 4){
        Serial1.print("4"); //increase GREEN
        return 14;
        }
    if(cNum == 5){
        Serial1.print("5"); //decrease BLUE
        return 15;
        }
    if(cNum == 6){
        Serial1.print("6"); //increase BLUE
        return 16;
        }
    return 0;
}