int led1Pin = D3;
int led2Pin = D4;

int led1Control(String command) {
   int times = atoi(command);
   for(int i = 0; i < times; i++) {
       digitalWrite(led1Pin, HIGH);
       delay(500);
       digitalWrite(led1Pin, LOW);
       delay(500);
   }
   return 1;
}

int led2Control(String command) {
   int times = atoi(command);
   for(int i = 0; i < times; i++) {
       digitalWrite(led2Pin, HIGH);
       delay(500);
       digitalWrite(led2Pin, LOW);
       delay(500);
   }
   return 1;
}

void setup() {
    Particle.function("led1", led1Control);
    Particle.function("led2", led2Control);
    pinMode(led1Pin, OUTPUT);
    pinMode(led2Pin, OUTPUT);
}

void loop() {

}