int led1= D2;
void setup() {
   pinMode(led1, OUTPUT);
   digitalWrite(led1, LOW);
   Particle.function("ledBlinkCounts", ledControl);
}
void loop() {
}   
int ledControl(String command)
{
    int blinkCounts= command.toInt();
    if(blinkCounts<0)
    {
        return -1;
    }
    for(int i=0; i<blinkCounts; i++){
	          digitalWrite(led1, HIGH);
	          delay(500);
	          digitalWrite(led1, LOW);
	          delay(500);
	   }
	    digitalWrite(led1, LOW);
   return 1;
}