#include <Arduino.h>
#include "flash_led.h"

flash_led blueLED(2);
flash_led redLED(4);

void setup() {

}

void loop() {
blueLED.ledFlasher(500, 250);
redLED.ledFlasher(1000, 500);
}

sketch.ino

diagram.json

#ifndef flash_led_h
#define flash_led_h
#endif

#include "Arduino.h"

class flash_led {
    public:
        flash_led(int pin);
        void ledFlasher(int flashTime, int flashtime2);
    private:
        int _pin;
};

flash_led.h

#include "Arduino.h"
#include "flash_led.h"

flash_led::flash_led(int pin) {
    pinMode(pin, OUTPUT);
    _pin = pin;
}

void flash_led::ledFlasher(int flashTime, int flashTime2) {
    digitalWrite(_pin, HIGH);
    delay(flashTime);
    digitalWrite(_pin, LOW);
    delay(flashTime2);
}