const Units::MS lifetime = 8000;
    const Units::MS flashPeriod = 60;
    const Units::MS flickerTime = 7000;
    const Units::MS flickerPeriod = 50;
    const Units::MS dissipateTime = lifetime - 25;
}

Rectangle FlashingPickup::collisionRectangle() const{
    return Rectangle(
        x + rectangle.left(), y + rectangle.top(),
        rectangle.width(), rectangle.height());
}

bool FlashingPickup::update(Units::MS dt, const Map &map){
    return timer.active();
}

void FlashingPickup::draw(Graphics &graphics){
    Units::MS time = timer.getCurrentTime();

    if (time > dissipateTime){
        dissipatingSprite.draw(graphics, x, y);
    }
    else if (time < flickerTime || time / flickerPeriod % 2 == 0) {
        if (time / flashPeriod % 2 == 0)
            sprite.draw(graphics, x, y);
        else if (time / flashPeriod % 2 == 1)
            flashSprite.draw(graphics, x, y);
    }
}