Text Machine, Get Gumball

int ledR = D4;
int ledG = D3;
int servoPin = D0;

Servo gumballServo; 

void setup()
{
   gumballServo.attach(servoPin);
   pinMode(ledR, OUTPUT);
   pinMode(ledG, OUTPUT);
   pinMode(servoPin, OUTPUT);

   Particle.function("knock",knockDetector);

   digitalWrite(ledR, LOW);
   digitalWrite(ledG, LOW);
   gumballServo.attach(servoPin);
   gumballServo.write(360);
 }

void loop(){
}

    


int knockDetector(String command){

    if(command=="Knock")
    {
        digitalWrite(ledR,LOW);
        digitalWrite(ledG,HIGH);
        gumballServo.attach(servoPin);
        gumballServo.write(55);
        delay(2000);
        gumballServo.write(360);
        delay(2000);
        gumballServo.detach();
        return 1;
    }
    else if (command=="no")
    {
        digitalWrite(ledR,HIGH);
        digitalWrite(ledG,LOW);
        gumballServo.attach(servoPin);
        gumballServo.write(360);
        delay(1000);
        gumballServo.detach();
        return 0;
    }
    else 
    {
        return -1;
    }
}